He said that this way, we could secure 20 homes using conventional lending this way instead of 10. 10 in the person with the higher score's name first while the other builds their credit back and then switch.Is this a common strategy? 

These vary by situation, but the most commonly requested documents are: Several months of statements for each bank account a borrower holds (including any investment accounts)Several months of statements for any outstanding loans, lines of credit, or other liabilities.

These are more common numbers to expect in many of the better areas

In the end, when you sell, homes with no garage are really really difficult to move unless you are in a neighborhood where that is common.

This is a common theme for Cleveland proper, I would look at inner ring suburbs like Parma, Euclid, Bedford.

I've heard several acronyms used for it but most commonly Ratio Utility Billing System.  

The requirement of possession under common law quiet title was because of the lack of a legal remedy (at that time, ejectment was legal and quiet title was equitable) if you were in possession, because you could not file ejectment in order to try the title.

Single family investing is just far more common, and most people are naturally familiar with it.

As I'm sure you know, things like multiple layers of roofing or sketchy appliance situations are common for Hamtramck/Detroit but certainly shouldn't kill the deal.

When you run the numbers on a 3 family, it is hard to simply approach it with commonly discussed strategies, such as BRRRR, when everyone seems to think that they're building is worth over 120k per unit.