My tenants have paid to upgrade all the apartments and buildings that I have ever purchased - new windows (every single one of my units has them), new floors, doors, fixtures, counter tops, appliances, paint, etc., etc.

Awesome slide Wendell!

I was addicted.2) We decided to make our first procurement a rental for his son while he was going to college (slow Flip is what we called it)  After we found this house we were not going to be able to get it ready in time for school  and that strategy was out the window.3) Got on bigger pockets market place and found a house in Indianapolis and went to look at it.  

To keep the city from tearing the house down they had to put on a new roof and new windows.

Saw one where the windows changed 5 times.  

I'd clean it off use a solution that has mild bleach in it.. check the crawl space below and exterior walls, or windows, or any roof leaks that are draining toward that area.. 

We took out a HELOC for $15,000 to get new roof and new windows back in 2003. 

I like how you guys did the accents around the window in the shower, great touch!

Any suggestions on how to check in the basement (no windows) of a rental without violating California landlord-tenant law?

I.e. window replacement, roofing, HVAC, demo and rebuild, etc....If you can provide a bit more detail in what type of work you anticipate I may be able to make a specific suggestion.Since you are Wholesaling, I assume you're not looking for GS's and contractors for total re-habs.