Thank you! And that would hold around 2 tonne if the weight scales up linearly, or is it cubed? Either way still cheaper than a house here in Australia

The final one we're building will be 60 feet and have a 650lb payload, so would have to be an ultralight house! And you'd also need a place to park a 60'x20' airship. Or I suppose you could just keep it in the air? There's actually a startup that's supposedly building air yachts like you're talking about. I forgot the name but I think they're 150-200 feet.

Thanks for the reply, yes I believe they are called Airlander

Rich people spend $200,000 to $300,000 on bus/coach size giant RVs, or 55-foot catamarans, so that's not beyond the realm of possibility.