@Brie Schmidt low unemployment isn't a leading factor for a recession, it just so happens that unemployment goes higher in a recession, so the period leading up to a recession ends up looking very low. 

The education is worth as much as the profit.

There's a lot of great free education out there about SDIRAS. 

These websites are also a great source to gain knowledge about so many things needed to make educated descisions.It's funny you mention Arizona, we might want to connect here on BP to exchange a few thoughts and more specific ideas and perhaps even collaborate.

Account Closed mortgages are usually created by mortgage brokers (especially due to new limitations set forth in the Dodd Frank act from what I understand) and mortgages are amortized over a certain period of time. 

Is there a "seasoning period"?

Recognize that some education and dialogue with them can go a long way. 

There is a 6 month seasoning period after the initial purchase to do a cash out on the increased value post rehab. 

If a buyer of mine is in the situation where the numbers are heavily reliant on that extra bedroom, I will write it as a contingency into the contract that the legal use of that bedroom is confirmed during the due diligence period so that, in the worst case, if it's unusable, we are able to offer a different amount or back out if the seller won't play ball.Feel free to message me if there's any way I can help!

Older homes have more risk, in my opinion, because things may not be level, you many not be able to use standard/bulk items, specialty items cost more, you need to create a space that matches the house period, and the potential pool of buyers who desire older homes is smaller (at least in our area).