If Class B, C  or D, then what credit score are you expecting from an applicant?

My question then is should I cosign with my father who has a lower credit score than my sister or should I look for something cheaper like a single family and do a brrrr strategy/flip it? 

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

This all depends on the loan factors like Credit score, LTV, DSCR ratio (rents vs the PITI payment), and loan size.Good news rates are down but the other positive news is they are trending down and that means you can pull cash out now and then simply refinance in 12 months or more to lower the rate.

I explain I will proceed with the eviction, the eviction will show with any decent credit/background check and will negatively impact their credit score, that I will attempt to garnish future wages, and that it will be very difficult for them to ever rent a nice place in a low vacancy area like San Diego.As part of my tenant criteria: no evictions ever (no excuses accepted), decent credit (I want tenant to have credit such as they do not want it to take a significant hit, strong LL references and in the add I specifically specify paying rent alone does not suffice for a strong LL recommendation.I recognize with my number of units and how many years I have been a landlord, I have been fortunate to never having to evict a tenant and at some point my good fortune in this matter will end.  

Sorry to hear about your score dropping.

Hey Beth,I have a rental portfolio in NC worth $1.1m but as a foreigner with no credit score my cash out was capped at 60% LTV so the portfolio has around $500k equity, so I'm looking for a 2nd position lender to lend the gap to 75% LTV.

If I were you I would make a list of what you’re looking for and start calling the local banks/credit unions.

Many local banks and credit unions will do a second up to 89.99% loan to value.

Go to your local bank/credit union and ask them for the same.