NH does not recognize pass-through entities, so you may be on the hook for Business Profit Tax (BPT) and/or Business Enterprise Tax (BET), depending on your individual circumstances.

Further to this, can an individual ("A") combine residential real estate rentals (two properties) held in a two-member partnership (husband "A" and unrelated individual "B") with other jointly owned (husband "A" and wife "AA") for purposes of a real estate "enterprise"? 

As the "risk premium" continues to drop because it has basically become acceptable, and even legal in some states, the rates will be driven to what it takes to operate at a "normal" profit, given the low risk of the enterprise (except general farming/crop/price risks).

They are a large listing company so they will have properties and depending on the area you want to buy they would be a good company to start talking to.Other companies like Enterprise, Renshaw, Revid, MPM and even Crestcore all manage property for investors, they are all quality companies and all are licensed and able to show you listings as well.  

Just no business enterprise running out of it.

Adam FlackSouthern Capital Enterprises, LLC

The IRS has broad flexibility using the facts and circumstances of a particular case to make a determination if the tax-exempt is substantially acting like a competing commercial enterprise. 

I'm sure your company does fantastic work, but please speak with your in house counsel about what states such plans are best for, as I, or any enterprising collections firm, would tell you differently.DISCLAIMER: The above, again, is not legal advice.

I develop enterprise applications for a living.

You would need to leave this small coastal fishing village and move to Mexico City, then LA and eventually New York City, where you will run your expanding enterprise.”The Mexican fisherman asked, “But, how long will this all take?”