Reno, Sparks, Carson City are very tight markets... 

The market is really tight, but with persistence you can make it work.  

You do not see this today... in any market that I am aware of .. new construction is not nearly as far over its ski tips as back then.Also there is this thought process that owning rentals insulates one from a down turn... this may be the case in already tight RE markets to some extent.. but rentals got hit very hard as well.

The other leak issue was that the leak was only evident when they did not close the faucet tightly.

OK, so the EPA says anything above 4 picocuries is unsafe, any good inspector will run a minimum 4 day average, in the mot occupied part of the lowest level, including unfinished basements, near the sump pit is suspicious,   it does seem to be that more are positive today, but even 4 years ago, testing was not as common, i have a system in my personal home i installed because it was 11.5, in my finished basement, i have done them in rentals and flips for bring just above 4 as well, homes may test fine, and a few years later high, due to geologic shifting, i think the big issue is houses are tight today, old home have plenty of air exchange, and it wasn't a problem just my opinion though. 

I need ample space and a rear storage area.

- that it makes me shake my head.Other thing about DSL: it may be an individual line from the switching station to your house, versus the water pipeline analogy, but the switching station is like a pig's trough - there's only so much room for all the pigs to crowd around, and once it's full you have to fight for space.

My first thought is that if I can generate a design for 6 houses and shared community green space(rather than individual yards).

Anything with wheels depreciates, however, if mobil homes are bought right and has space of land, it can be very profitable. 

I tried to log in, both from my phone and on my computer but I kept getting that mysterious 'sit tight' message others have written about in other forum posts.