You can.pick up an old caravan for under £1000 . That will give you a boiler and heating fridge electrics and more. Looks a good way to go.Why not investigate a cheap caravan that may have water ingress issues making it uneconomical to repair but with good furniture, equipment etc. You'd get the lighter furniture units and other equipment too.
andI’m converting a crafter
One reason few converters use the crafter/sprinter is that the body is too narrow at the back for a transverse bed over the garage. This was also a problem for VW's new Baluga Whale crafter conversion.High level bed over the garage is more or less what I’m looking for.
Another alternative is to have have longitudinal beds with the foot end going under the cupboard/cabinet work towards the front, this used to be a trick that many earlier campers did to get the extra sleeping length without making the camper feel squished, if you have a look at the East Neuk Touring S and Touring M models you can see the space under the wardrobe.and
One reason few converters use the crafter/sprinter is that the body is too narrow at the back for a transverse bed over the garage. This was also a problem for VW's new Baluga Whale crafter conversion.
This leaves you with longwise beds/bed which can make the rest of the van cramped. A possible solution is to copy the Swift 604 escape design that has a lowering bed, which if made with proper bed slats could be a nice lightweight design.