You might be able to work with your tiny home architect to make the foundation more permanent.P.S.

I am licensed Architect with about 17+ years experience working with clients in the both public and private sectors.  

Hello everyone,My name is Abhijeet R and i am an architect from mumbai, india.

Really Im open to both, but I think it would be quite a bit easier as well as quicker to buy one that just needs some rehab as apposed to finding land, having an architect draw blue prints, and then going for broke while trying not to go broke hahaha

You may need to get an architect or a structural engineer involved.  

I signed up for Bigger Pockets for the wealth of information and resources as I navigate my passions for design, development, and wealth management. I'm interested in all things worthwhile.Tim

However builders build what architects spec out and most of the time exterior walls will have R7.5 foam with hollow metal studs that loose a lot of energy due to high conductivity loss.

I have a wealth of resources from handyman - contractors, architects, builders, etc to help with my clients needs. 

@Jim Adrian, an architect I'm following, might have some input specifics (except I don't know how to make the @name thing work so he probably won't see this).I personally come from a design background, landscape design specifically in this case.  

I am an Architect(working towards licensing this year)  working full time in my 40's .