I'm sure someone who is a lawyer here can provide some better pointers on this end, but you don't ever want to be the primary mediator when something is bigger than the most mundane issues between tenants. 

Also ask how many jobs he will be doing at the same time and where his primary attention will be during this project.

The main benefit of buying your primary home first is the first time government home buyer programs and the fact that you will get the lowest interest rates here plus the tax advantages and lower down payment etc. 

Personals are much easier to qualifier for so its a great way to get your foot in the door.In your situation you could buy a great future rental, and use it now as a primary.

@Lane Mccracklin Actually at this point it is my primary residence but I do own it free and clear.

The numbers: - Owe 418k on the rental house (it used to be my primary home) - Market value is probably 650k (my neighbor's house, exactly the same sold for close to that amount) My thoughts are - getting a line of credit and using that to fund new investments will just lead to lower cash flow per month as I'd be paying interest on my line of credit and and any other loans.

In general, what distinguishes a "primary residence" from an home purchased with the intent to flip?  

I was thinking about doing a cash-out refinance, 30 year term, for my primary residence to pay down the rental house.

Any suggestions appreciated...Currently have 6 mortgages, A primary residence...4 long terms rentals, one of which is about to go on the market and an investment/second home/vacation rental.

I will be living in one unit for primary residence along with my brother.