Advice on replacing a building with a log cabin, or similar

johnnyredgate

Hi I am looking to replace a prefabricated asbestos bungalow, which I don't feel is safely habitable, with possibly a log cabin, double mobile home construction or similar. Aiming to keep costs as low as possible and building as simple as possible but do want to end up with pleasant living space (the current bungalow is within a nice wooded and grassland plot), removal of the existing building could cost up to 40k!
Any advice appreciated of good value sectional/mobile buildings welcome or any to avoid etc.
Hoping the planning should not be too difficult, however as the front edge of the bungalow is on the edge of a conservation area there could be some issues, also I have heard of problems with siting log cabins near to trees due to a perceived fire risk, so again any advice or thoughts on these issues welcomed too.
thanks