Oooooh just googled this, it looks fantastic. My chosen options including insulation (same size as yours) would be £1200 which is less than the total cost of my current 10ft x 6ft shed linked via runaround to a 2m x 2m full height run. I insulated the shed myself and dread to think what the actual total cost was!!
I don't have any immediate plans to get a new set up but I do dream of taking on a new pair of rescue buns one day in the not too distant future and this would be my ideal set up. I've got four bunnies already and they take it in turns in a fenced off supervised free range area too so my new ones could get some out time. I've got the perfect spot in the garden as well! Thanks for the reply, it's something to ponder on.