Please do not disparage people who choose to carry.

. $480,000 sales price, and all 8 units are rented out at $750 but could easily be raised to high 800's or even low 900's.

I would suggest you talk to a mortgage broker or a bank though - if those homes are zoned commercial you will probably have a hard time getting an FHA or low down Conventional mortgage.

The Payment is not an issue but I’ve just never done owner financing and someone suggested this method as a way to acquire section 8 homes in low crime areas.  

Your remaining balances weren’t entirely clear on the two mortgages, they are really low rates, so instinct is not to refinance them, but sometimes it is worth it for the longer term vision.It also seems like you may be considering tapping your equity to replace your income, without knowing your age or long term goals, this doesn’t seem like a great idea on the surface.If you are interested in jumping into real estate full time to replace your income you should realize that is probably going to take 12-24 months.

Few will do them, and those that will, have very low leverages and higher fees. 

You may choose to invest in real estate directly by acquiring a property, or passively by investing through a syndication (or by being a lender to someone else.  2) pencil out the numbers to see if the math is in your favor for a Roth Conversion and real estate investment with a SDIRA.

It's important to choose that one and commit to using it.

Your worst-case scenario (not specific to MA) would be having to sue to get them out as a holdover, but this is really reserved for worst-choice scenarios when owners choose the first renter or don't do any due diligence.

Securing loans with a low credit score is possible through private or HM lenders.