I invest exclusively outside of Fort BraggThe only benefit of buying in a military town is it can be somewhat insulated from economic downturns. the detriment is military towns are generally stagnant.

My tenant asked for additional insulation and gave an estimate of $225.00.

I installed a new hvac unit in my personal house, blew in 12 inches of insulation, added soffit vents 8 more of them, a ridge vent , and added storm windows at the recommendation of my hvac contractor. 

But it will need a LOT of work, insulation, updated wiring, new roof, heating system, and potentially a foundation.

Any mold in attic will require new insulation.

In any case, storm windows over a well painted and caulked window trim can almost equal the r value of double paned windows and it matters little because glass is a terrible insulator whether single paned or triple w argon.

Some units are poorly insulated and the tenant downstairs can hear the tenant upstairs talking on the phone or watching TV.

If you sheetrock & insulate the ceiling and add appropriate recessed lighting, it adds a sense of completion that is currently lacking.

Kitchen, flooring, bathrooms, paint, insulation, drywall, electrical, plumbing, new heating system, windows, doors What was the outcome?

I am in full agreement that a positive cash flow is a very important goal, due to the fact it insulates you from gambling on appreciation, equity, and rent increases.