No matter what happens in the future, if your strategic and hanging out in the right groups, you'll find a way to continue being profitable!  

. - Install two new high efficiency condensing boilers, and update windows and insulation for better heat loss performance.PROS - a) minimally invasive; b) can provide 15-30% reduction in heating costs (we are told).CONS - a)total gas expense is still paid by the landlord; b) individual units won't have individual control (except for a thermostat controlled shutoff valve for heat/water in each unit); c) AC would be available on with in wall/window units. 2) Try to individually meter each units' gas and provide each with a traditional forced air heating/cooling system.PROS: a)gas expense could be completely removed for landlord (huge)- even tankless hot water could be installed in each unit; b) each unit would have their own climate control.CONS: a) constructions costs of running new gas lines and soffiting sheet metal duct work. b) highly invasive with collateral construction costs; c) future costs of maintenance on multiple systems vs a single building-wide system. 3) An electric based heating system- This is tricky in my mind because of the high cost of electric heat.

The lobby is comfortable too if we wanted to hang out before or after that.  

Hang in there for a few years till things correct or inevitably rents go up and the fixed mortgage stays the same.The people that only own vacation rentals and paid too much will likely go under in saturated areas.The other option is to be the tallest pygmy and stand out amongst your peers.

Very chill meetup with no pitching or sales, just REI people hanging out and talking shop.

Or hang on to it for a year or 2.?

My advice is to go work for a PM company or two, get some experience, invest on your own, then hang out your shingle after you learn the industry a bit.  

I am attempting to avoid a neighbor dispute about an oak tree branch hanging over their property and would like to consult with an attorney to be clear on the local law.  

Will you want to visit and hang out on occasion?

Okay maybe they were hanging out and stayed the night.