Heating Issue w. Old Property

[Juwan Parker]

Hi everyone and thank in advance for answering this question.

So I purchased a C-Class property in Tulsa, OK with an window unit that included AC & heat. It was an old unit and went out, unfortunately. I assumed my property manager replaced it with a similar AC/heat unit but it was only AC because they couldn't wait to replace the tenants cooling system. 

I just found out it doesn't include heat last week when the tenant brought it up. What is the best way to provide heat in an old, 900 sq ft home?

A couple options I thought about were electric baseboard heating, a floor to wall heater in the living room & 2 bedrooms, I considered HVAC but heard in a home that old it could create other issues... Any advice or suggestions are appreciated!