If you are the one doing the BPOs to do your job properly you would need to estimate market value, which as an investor usually isn't where you want to be buying at price-wise.

Currently I have zero debt and have enough liquidity to lock down a pair of SFH rentals this year.Are there any other major reasons I'm overlooking by buying investments before a PR?

As a result, they did not demonstrate that the foreclosure sales were valid to convey title to the subject properties, and their requests for a declaration of clear title were properly denied."

Can anyone suggest a good place to start in order to properly build a business on private lending.

I will definitely seek counsel for more information on the proper legalities. 

At the beginning of escrow when purchasing this unit, I asked for the proper documents to be sent to me so I know what I can and cant do within my flip, but unfortunately the proper documents weren't sent to me which led me to assume I could move forward with my project. 

This is not something you would want given the current situation, not to mention all evictions have been suspended.Additionally, given all the social distancing guidelines it's going to be pretty difficult to properly screen and show the unit. 

Have them get a simple Warranty Deed online or from an office supply store, fill in the blanks with the proper legal descriptions. 

I would start with first light not working properly closest to electrical panel.Check out YouTube

Done properly, I think it's a great way to buy/sell any real property.