I've been looking at similar things with modular housing recently and the issues have been both finance and also council approval.  Some councils just plain have issues with that type of housing, don't like it and don't want it in their area.  Not amount of logic can convince them otherwise.  As it's removable housing some loop it under the same sorts of conditions that really were meant to cover caravan park trailer style homes.   I think it's a matter of finding councils that are OK with it.  I've been having trouble with that, I was hoping building companies themselves would give us a tip but so far no luck.  If anyone knows of any councils like this in NSW let us know…

Weirdly enough I heard conjecture of one council that would allow a container house but not a modular one!