Think I would rather a full home theatre, memory foam superking bed blah blah than 3 classic minis
Are you not going to have room for any cars at all?
If not, then may I ask, what are you intending to do with this coach once it is finished? The expense is significant so I'd imagine you have plans.
The reason I ask is that we spend as much time as possible touring and on road trips and at the places we like to go (Mountains, etc) we invariably encounter a lot of camper vans. Even the small van based ones end up being quite a nuisance and finding it quite difficult to access the more interesting places you may want to go - medieval cities, mountain passes, that sort of thing. So we often end up trying to work out why people bother with a camper van rather than a caravan they can detach and use the car for exploring with or, better still, a hire car and hotels - of which you can buy a heck of a lot for £60k!
So what are your plans? I'd have thought this thing only makes sense if it can accommodate a small car, so you can use it for travelling distances on major trunk roads and then use the car for exploring the good bits of wherever it is you go.