In California, is it required that you use the C.A.R. purchase and sale form specifically?

PRELIM LAND PLANNING- do a preliminary layout, please remember stream buffers, specimen trees, ANY jurisdictional waters (its a good idea to have you county water systems guy come walk your property with you to verify any jurisdictional water systems and what the required state and county buffers are for those systems).

Additionally, do you use a form that tenants are required to complete and return within a certain number of days to document any immediate issues?

People underestimate the amount of cash flow required.

South Florida is a competitive market, and you'll need to do your due diligence on zoning, parking requirements, and other restrictions.I also made a quick video breaking this down in case you’re interested in hearing more details.

Quote from @Jamie Hora: The question you pose in the title, "Is a rezone required if availability study can support more density". 

I sold a property last year that required the owner to get a certificate of nonconformity to be a legal two family.

What I see manufactured for sale is more a promise than reality.

This is a more affordable option but only protects against named events.Comprehensive Coverage: Often called “all-risk” coverage, this protects against most unexpected events, except exclusions like flooding or earthquakes, which usually require separate policies.

The caretaker would be required to assume paying taxes and insurance plus upkeep.Both units need a fair amount of work prior to being rentable now that it’s been vacant so long.