I was professional and polite but explained any attorney in the world would tell me not to sign it. 

I found 2 heirs of the property from the decease guy and they signed a contract to sale me their portion of the property.

I'm in San Jose CA.My questions for CA LO transactions:1) Where can I obtain the required documents?

If so what time of the year does that region usually start signing leases?

Typically the agents agreement to the mls is that it doesn't get changed until it is ratified, which would mean that all the initials have to be signed and delivered.

They can't discuss their clients accounts so it will take you weeks trying to get over that hurdle even with a signed form from the seller allowing you to discuss it.

Should I wait to have these items done before signing the contract (could take weeks) to give time for home inspector to inspect the property (and risk another buyer over bidding me), or just sign the contract and have the home inspector come when everything is done?  

Currently we have a property with a lease signed for November 1st and have just purchased our next BRRR property.

You'll find your MAO (maximum allowable offer) buy taking the ARV then subtracting all rehab expenses, holding/transactional costs and desired profit.

Keep in mind of all fees and holding cost related to the transaction.