You sign a P/S, and what makes that document binding is when you place the deposit in conjunction with the physical paperwork.  

Can anyone give me tips to avoid physical altercations at my units geared towards low-income tenants? 

I don’t think I can get city inspectors in before the end of my physical inspection period.

As far as analyzing deals, do you think that just constantly running the numbers and physically analyzing it would do the trick?

Typical is to have the building under contract and past physical DD, just to avoid the cost/time of setting up the LLC and operating agreement. 

But it's not protected under the Federal Fair Housing Act.Here's a link to what's protected under the Federal Fair Housing Act:RaceColorNational OriginReligionSexFamilial StatusDisability   Even apartments.com's own Terms of Service don't seem to prohibit what you posted (again, as long as you didn't reference source of income):Compliance with Fair Housing LawsAll Content is subject to federal fair housing laws, which make it illegal to indicate in any advertisement any preference, limitation, or discrimination because of race, color, religion, sex, physical or mental disability, and/or familial status.

The deep-dive content one can gain from reading long-form books is unique, whether those books are in physical, or electronic format.  

It might physically still be a box, but as long as the address doesn't say "PO Box", you should be fine.

-How or where do people scan in physical receipts?

I may be displaying my ignorance here, but is there a way to BRRRR a note much like people do with physical real estate?