I'm not sure the specifics of that market but my initial gut reaction would be that 90+ day stays may be a bit too limiting to make an MTR worth it. 90 days could work well with the average 13 weeks for travel nurse contracts but may limit your digital nomads, business traveler, etc bookings.

I personally would stay away from an attorney because many of them do title on the side. 

I’ve been studying and gaining knowledge of real estate investing.

In 2011, I moved to Switzerland and decided to stay for a couple of years returning in 2012.

I will certainly hire a real estate lawyer to draw up the contract but I was hoping to get some advice from the knowledgeable folks in the forum.

You are already on the right track as you are seeking out the knowledge you will need to be successful.

Anyone with local knowledge of subdividing properties who might be willing to share some advice?  

Give them a timely manner to get out 3-6 months (they have 10 months left on lease), evict right away, or let it stay until end of lease and not sign with them again?

I'd like to take legal action against the tenant to collect the amount I'm owed, but I don't think I can file a small claims case, since the water bill account is in the owners name (the account must stay in the owners name for legal reasons).

So if your plan is to stay in NH, that property would have to be in NH.