So if only 1/3 is purchased, then the 1/3 sales price would be added to whatever basis the buyer has in the 2/3 of the house and added together for total basis in the property. 

Is it considered to be added protection for me, to where I have recourse in the case that stuff goes south?

I've been tending to put the bar high, like 78" ( with 9' ceilings I alway build separate storage above) so a second bar can be added, but I think I'll do it your way.

The 3rd is the one that has the notice of how much we will be adding to the escrow.

The advantage to that is that you would be able to take advantage of the still available deduction of of the full interest on the mortgage and the property taxes and the appreciation can be added to your equity when you do buy a home to live in.

It turned out that they put one bead of caulk on the roof vent and it hasn't leaked since.

My tenant wants to move in his pregnant girlfriend, what is an acceptable additional amount to charge ? . I havent raised the rent in the almost 3 years he has lived there , he currently pays $1K/mo for a large studio...

More times than not you’ll come across an opportunity that you’d like to jump on but, if you’re tied to a 30 year mortgage, some complexities will be adding in.If you’re planning to be here long term then I would definitely try to buy.

You'll have to pay for them in cash at closing, and then the escrow amount will be added to the payment, but kept separate from the mortgage.

Also there is a laundry room that he currently doesn’t charge for, I’ll be adding coin op laundry and charging a small amount.