Drew:A single heat source in converted homes is not uncommon.  

Owning in different states isn't too dramatic for taxes, nothing undoable by any means.My theory is always stay fluid with the markets so you can always be sure you are getting the best returns.

. - Brick or concrete for backyard - fence - update electric, heating/air system - new plumbing - repair entire exterior, paint or new stucco, remove siding in rear, add railing in front - new kitchen/bath - refinish floors - carpet in bedrooms - paint throughout - some walls, floors and ceilings need repair - extend/add room behind kitchen to add first floor laundry - new roof, windows- Currently 4/1, would add at least 1/2 bath on 1st floor to make it a 4bdr 1 1/2 bath or full bath for master suite to make it 3bdr/2bath - No finished basement, but want it cleaned up and painted - recessed lights - The layout on the 1st level will remain the same, with the exception of the extension for the 1st floor laundry and possible 1/2 bath.

If the Landlord pays for the heat, upgrading is a no brainer.

Rentometer is another resource for comp rents.Trulia has a "local info" section with heat maps to visualize data like crime and demographics.

A major overhaul of the heating system is not feasible this week. 

I am working on a 375 sq ft studio apartment and was considering a  slide in wall AC unit with heat.

We also installed a forced air heating/cooling system.  

I own a single family residence that has radiant heating and a swamp cooler on the roof.  

Especially in a market that has been heating up.