You don’t specifically need to sign a new agreement.  

Hi All, Been focused on sourcing off market industrial warehouse deals in the Phoenix area, but we've been digging up a few deals that are too small for our PE partners, specifically multibay industrial properties that are under 15k Sq/ft. 

(a)(2).The code specifically says " 65852.22.

While it is OK for the legalities, I feel that the safer the pool area, the better.

Keyword being SECURE and ALL PARTIES...you can get a lender on their portal and a title company on theirs, but there is no one place that everyone accepts as a "hub" to communicate that is not specific to a company.

You would have to be a bit more specific on what you are trying to accomplish with your long term or is your main play appreciation.

If you can definitively prove that the seller intended to deceive you about the square footage for their personal gain, you may be able to take legal action, but probably low chance of success considering you had ample opportunity to measure the home or get an appraisal with measurements prior to closing, and had your chance to negotiate the price based on square footage and all other factors prior to closing. 

I have looked into this a lot on BP, facebook, and reddit, but have found nothing specific for land contracts. 

I thought about this, and not sure if legal so check rules.

If you only want long term rentals, then HOA should be fine unless they specifically prohibit or limit rentals.