The parent LLC will have an umbrella company agreement or operating agreement that will state the company is authorized to create specific series. 

Do an estoppel agreement if you want to verify rental amount if lease is not provided.

I have had investors try to do seller financing but it was confusing in my case since I still had a mortgage on it and then he also wanted to do cash but drastically dropped the offer price so in the end we didn't come to an agreement.

How should I set up our agreement for who the landlord is?

The notice of sale must include an executed duplicate original of the third-party purchase agreement and make available specific details about the property including the most recent rent roll, list of vacant apartments, income and expense report for the 12 month prior to the notice and any other information the Housing Commissioner may specify by rule.Tenants’ first right to purchase the building before a third-party (‘Right of First Refusal’)Tenants in buildings with five or more dwelling units have a period of 90 days from receipt of ‘notice to sell’ to form a union to exercise their “right of first refusal.”

However, the pay or quit eviction notice I use specifically states that partial payments are NOT accepted unless there is a WRITTEN agreement to do so.

I know he is your brother, but that's a quick way for a bad Thanksgiving dinner when you disagree about something and don't have an operating agreement to help you resolve the issue.

First, both parties have to agree to terminating the contract and then they need to sign a termination agreement.

Just seeing who requires new owners/landlords to provide their financial documentation upon signing a management agreement?

We make it work because we an agreement but could I do similar things with other properties I have and scale?