Or would I be better off simply trying to partner up with someone who can co-sign on the deal?

It's a sure path to failure. if you're goal is cash flow and you live in a high cost market which is any where in the Bay Area, you really don't have a choice but to go out of state, otherwise you're just trying to pound a square peg in to a round hole.

I feel these are questions should be directed to your attorney rather than a forum where users may not be familiar with NH tenant/landlord laws.Where I'm from, you cannot simply kick people out or raise their rent in the middle of a lease.

If you're curious, my favorite course is Pace Morby's simply because of the amazing community - it isn't the cheapest but you get what you pay for. 

@Kelly I.Thank you Kelly for reaffirming simply safe!

In fact, I am planning to give them 6 months notice in advance, in good faith, and also give them plenty of time to find their new place.My questions are :(1) simply informing the tenants about not renewing in a form of letteris GOOD?

Are there any pit-holes that i should be aware of?

Now that the Sellers have moved out, we [Buyers with Agent] took pictures of damages that weren't there at closing (e.g. broken baseboard, excessive holes in walls, mold in washer, etc.). 

Simply writing it down and making adjustments as you progress is all you need to do.

@Alipate Moleni  Yes, You would simply do a refinance on each property where you could take the cash out needed and reduce the rate below 5% on a 30 Year fixed.