How or where can I find that type of contract agreement? 

What does your PM Agreement say about when they pay/send reports? 

The home you own in which your parents live will need to verified by 1040 tax returns showing the gross rent and expenses on Schedule "E"  in addition to needing a copy of the lease agreement or rental agreement.

I would recommend having an attorney write up a short purchase agreement when you agree on price. 

Market conditions are differentPurchase and Sale agreements are written differently Lenders have different underwriting criteria, etcIf you have cash saved, next step is to build your team in the market you want to be in:RealtorMortgage LenderInsurance BrokerContractor/subs if you are not doing your own rehabAs long as they are good, those people will be invaluable to you and ultimately make you money.

There is a ton of good information in there and the lease agreement among other docs look good for a newbie.I also have one other question, the building has a single water meter.

These will be spelled out on the business and loan agreements from the bank. 

It also is helpful to have a California LLC in case you ever sell that property and move into another state so that you do not need to form a new LLC altogether with new operating agreement, just re-register in the new state as a new foreign LLC.

The bank you go with will require the seller to sign an agreement that includes an assignment of rents in case of default. 

I have made a rough draft of the roommate agreement/ lease so they will know what is allowed at my condo and overall what I expect.