@Corey G.I would say same as recommended above about a package deal or.....Look into Mitsubishi mini split systems perhaps.

@Liz Rogers I assume you are referring to a Mitsubishi ductless split or something like that.

Even finding one or two of these could pay off.4) something else to possibly consider are units made by Mitsubishi.

Mitsubishi is the brand we went with. 

I have two Mitsubishi hyper heat systems in my house in northern Minnesota and they work down to -17 F. 

Ductless mini splits like a Mitsubishi hyper heat?

When he purchased the units I advised that small mitsubishi AC units were relatively inexpensive and would attract tenants more than evap.

Look at Mitsubishi's Mr.

Mitsubishi ductless systems are great and not to bad on cost anymore.

Heat pumps also act as central air in the summer months.The Mitsubishi H2i ductless mini split heat pumps heat down to -15 and no backup source of heat is needed and is more efficient then even a high efficiency gas furnace, which is ridiculous.... but they are very expensive.IMHO,Gas heat is the cheapest when balancing up front installation cost and long term utility costWe are talking a $22.50 difference between gas or electric per 1,000,000 BTUs burned.