Your brother has more say than your gf at this point on paper. 1 option: Sell the asset, split the proceeds, and get your own property to do as you please. 

Any paper trails that should be in place or is it as simple as giving notice at the right time next year and not renewing the lease?

The 2019 build would blow away/wash away in a storm way before the 2000 build but to the insurance company on paper the 2000 build was a higher risk. 

Paper work for the deald.

Wear gloves and wear a good mask with a filtration system, not just a paper dust mask.

The lower class buildings look higher cashflow on paper but real life it all nets out around the same.

It's like using your ex's lawyer to draft the divorce papers then just signing them blindly without getting your own lawyer to review and negotiate.

Regarding the other comment, I would strongly recommend using a PM, while on paper they "cut into profits", I believe they save you money (and time) in the long run if you have a good one.

Section 8 sounds great on paper but there are a lot of things to consider. 

Guest runs out of coffee, runs out of toilet paper, needs more towels, etc, we can usually get them any of these things in under an hour with the delivery service, and for much cheaper than the typical service call to try and have your cleaner stop by.