I've been working for a while on a whole gunge tank kit, you might have seen my gunge tank valve that I currently make but have been looking into building the whole thing. My main question is how much would people be looking to pay for one. Right now it would be uk only but with postage I think a full tank kit would be around £650. This cost could be brought down a lot if people were ok with cutting some pieces of wood to length as they're the most expensive parts to post.

I remember when I looked at tanks the price was over £1000 so your price seems reasonable

Could you sell at two different price points, or would that be a logistical nightmare?

£650 it would depend a lot on what the final product looks like. Do you have any sketches/mock ups/prototypes you're happy to share?

Ex-VAT/Inc-VAT?
Hot seat included?
1 or 2 person?
What are the dimensions? Weight?
How much gunge can it safely hold overhead?
Can it be flatpacked and re-assembled?
How easy is assembly?
How easy is it to drain/clean?
(Aside from splatter) Is it self contained or does it need a catch pool?

(Slightly off topic) What are your thoughts on selling pump kits for 'infinite' gungings?

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As a hypothetical customer; overall price; £650 isn't overly crazy- the Airquee inflatable gunge tank is £650 Ex-VAT, plus delivery estimated at £100, and you'll need a blower (£70-150+shipping)
https://airquee.com/en-gb/product/gunge-tank/
If you can be all in for £750 inc-VAT and delivery, with a smaller footprint tank that can deliver 50L (or more) then you might be onto a winner since a static tank eliminates the hassle (and noise) of a bouncy castle/blower.

Feels a little much, though I don't know how you have made the things of course.

Might want to do different ways as if someone doesn't need the cabinet part (can adapt an old wardrobe or has/buys a scaffolding tower) the they would only want the gunge tank part, which would cut down on cost and shipping.

Ok so if looks like everyone would like some more information so here goes.

What I've been looking to create is a solution to those that really want their own gunge tank at home. Using a combination of wood batons and a selection of 3d printed parts I've come up with a design that can be used then taken down and stored away when not in use.

The whole thing would stand around 2.4m tall and 1.2m square which i think is about the minimum sizes to get the desired effect.

Im considering offering a couple of different kits which would be.

The whole kit with all the batons cut to length and all of the appropriate hardware needed to have the whole tank ready to go. The real major cost in this would be the postage as the only carrier that seems to be able to take a package of 2.4m long is parcel farce and they want quite a lot to deliver it.

The second option would be just the 3d printed parts and a list of materials and parts that would need to be sourced by the purchaser, this would lower the cost substantially but would require a bit of extra work in ordering the materials and some cutting to size of the 40x40 batons. Links to the exact materials and hardware would be provided to make it a bit easier.

Hopefully that clears things up a bit bit please do ask anything you want to know and I'll endeavour to answer.

And there's a render of what the tank would look like.

That would be the potential price with postage included.

It would be a single seater tank (you'll need to provide your own stool)

It'll have a plastic liner to contain the splatter.

The tank would hold around 45 liters. Which is well enough for a thorough gunging

It would be quite easy to put up and down using simple hardware and wing nuts.

Yes flat packable

You'd have to stand it in your own supplied bunding like a paddling pool.

The one you linked to is very much a thing, it's also huge and definitely wouldn't fit in my house.

As for infinite gungings I've spoken with people about this before, it really is a case of finding an appropriate pump that can handle it abd some piping, the real issue would be making sure any setup you make was electrically safe.

£650 seems steep.
I built my one using square aluminium for £120.
That was all precut with connectors.
It can take 40litres in with the current tank at the top.
Wood goes rotten after a while.

Looking at your rendered design;
You could certainly offer a 'light' option of just the brackets, plumbing, and top tank. Cutting some wood to length and drilling a few holes is well within the ability of anyone capable of assembling the tank from flatpack.
[Ultra-light version could be just brackets and plumbing, with the wood and top tank supplied by the customer?]

The potential design issue I see (as with any gunge tank) is if you set it up indoors, the top tank is very close to the ceiling, and would become quite awkward to fill since you can't pour a bucket in the top and lifting the top tank in/out is almost impossible due to the weight of a full tank.
Do we [anyone?] know any workarounds other than customer reducing the height of their unit?
Is there an oversized syringe which could slurp 5-10L of gunge out a bucket and push it into the overhead tank?

RE: woodwork rotting.
Dried and treated wood [off the shelf at any DIY store and builders merchant] takes a long time to start going soft when left wet, even without any extra treatment.
As long as the tank is properly cleaned and dried out before storage, the wood will last for over a decade before any rot becomes an issue. More likely the bolt/screw holes getting worn through from regular re-assembly will put an end to the woodwork long before it rots out.
[Granted if it's installed permanently, it'll need some extra sealing work and treatment to prevent and control any trapped moisture].