@Sharath Kumar the pop corn ceilings could be a major problem along with any texture on the walls if they are asbestos or lead containing. there is no way to do it your self in Colorado both the removal of asbestos and lead are highly regulated by the Colorado dept of public health's air pollution division, it would be really dangerous to attempt to do this type of friable removal in an apt building because of the shared air systems used in the 1970's you could  contaminate the entire building with asbestos fibers or lead dust.

consider proximity to an airport wit reasonable fares,  Manty and Trivers (local speak) are a Hike to Milwaukee Airport, and Green Bay is quite expensive to fly out of. just a thought, Unless you fall into a great deal, a $50-70K 4plex is gona be pretty rough,  both in condition and location, get familiar with the areas, and if you do settle in Manty, Just remember its Cooler Near the Lake, not sunglasses and board shorts cooler, like 50 degrees in late June, and 20 miles west its 80 degrees. just considerations.  

“Because the $20,000 took so much away from their equity to put into another home, they decided not to sell,” she said.Another client of Chaname had difficulty selling his home because would-be buyers balked at paying $16,000 more for a home with HERO-financed air conditioning, duct work, water heater and insulation when similar homes were selling for less.The buyers argued they were paying for the improvements twice – through the higher valuation on the house and assumption of the loan.

I paint runways on an airport and provide Aircraft Rescue and Fire Fighting (ARFF) at an airport now. 

Cosmetically, it needs lots of updating, and it doesn't have some standard amenities like parking and central air that most expect in this neighborhood.

If they call to ask about a light bulb that burned out in the ceiling fan or the air filter in the HVAC, how well can you politely but firmly remind them that it's their responsibility.

The units were causing so many issues that rather than having a tenant call describing no air every month it was better to replace the units. 

I purchase homes to flip and cheap (5-40K) rentals all through Savannah, Pooler, Port Wentworth and the Islands.

We stayed on air mattresses at a friends house.

I know that that would not be legal where I am, for a variety of reasons, not even for the 5% fresh air, nor the above ground feet, nor the fact its not on the CO).