Soldato
how hard would it be to buy plot of land and build big 3 or 4 bedroom log house?
Getting it past the planners etc.
Probably quite hard getting it past the planners.
http://www.channel4.com/programmes/kevin-mcclouds-man-made-home/4od
Kevin McCloud's Man Made home might be of interest to you.
He's pretty much done what you suggest, but has had to make it 'mobile' so he doesn't need planning permission.
kd