My main goal is to find something relatively close to the DMV area but without the DMV price tag.

They'll want all the money spent on the main house, lenders kind of ignore ADUs it's weird. 

Mainly interest rates and cash flow.

Definitely install backup flaps and valves for all floor drains and the main line.

Airy closer to Germantown Ave, the more north the better (19119)Garden Court (19143), Cedar Park (19143), Walnut Hill (19139)B: New construction going on but mainly as multis, few SF build and sell, most action are in flips rehabs, no bars or restaurants yet.

This is mainly how we find buyers to offload our learnkey properties too.

And a lot of old school GCs may not have the ability to take a CC and may not care to learn how to...Main question is: why do you want to do this?

It all cash flows like a gold mine until the roof needs to be replaced, the main line goes, or you get your first turnover bill and need to upgrade a kitchen. 

We then moved to a different state (from Arizona to California) but we knew it would be temporary so we kept our house in Arizona and we rented out the main house as well.  

For context its mainly retirement communities around 2 hours either way from Las Vegas and Phoenix.