An appraiser could probably provide better context on professional standards in this area, but I think 90 days is a nice to have not must have.Are you using realcomp MLS data or public sources?

However, I am researching every property through neighborhoodscout and other sources of information to get a feel of what the neighborhood feels like.

But Mike is right, in low balance notes it can be fairly common that BPO agents overstate value based on a property's exterior condition.For the 2nd note, you need a credit report to get clear on the senior lien status (a current senior lien is obviously best since a borrower most likely has a source of revenue and paying the 1st indicates that the borrower probably wants to stay in the home).

BP is an excellent source of learning.

Cities & Counties are constantly seeking new $ sources.

There are also called Funding for Flipping:https://www.biggerpockets.com/forums/55/topics/276391-sources-of-funding?

When I see POF's from certain sources, some off the internet and some local(a couple I know are just BS as part of a wholesale mentor/partner program) straight to the trash they go.  

I intend to save out a piece of linoleum from the floor and use @Dawn Anastasi's trick of lining the bottom of the sink cabinet with linoleum to prevent this kind of thing from happening in the future.Also discovered the source of yet another smell.  

As it is one could add 100k to the price solely based on CA home builders regulations.

These 5 yr old HW tanks will be re-sourced into properties we are going to sell.