One last question. I've got a week off work and was going to knock up a pent style out building using 4*2 and shiplap cladding. As I'll need to disassemble it when the house is built, so it can be relocated, I didn't want to make it too heavy, eg, cladding / batten / tyvek / OSB / timber frame / insulation/ vapour barrier.
Therefore, I was wondering, whether I could do cladding / tyvek/ timber frame / insulation. This would enable me to remove the insulation so I could get to the fixings holding the walls and roof together.
I've priced things up and for £1000 you can definitely build a suitable out building.