And in other cases you're dealing with a huge difference if you're dealing with asphalt-ish stuff or concrete. 

These are the basics:6 unit building, all are 1 bed 1 bath units.4 units rent at $6002 units rent at $6254 leases signed until may 20132 units month to month.all 6 furnaces natural gas, all 4 years oldall 6 water heaters 5 years oldall windows newroof 9 years oldsiding greatdriveway pavement 8 years oldall units individually metered for gas and electricity.all up to Rhode island fire code with pull handles and hard-wired to Fire Departmentas a bonus, an outbuilding is on site used for tenants' storage.The neighborhood is great.

Many of the experienced guys here advocate beating the pavement and it looks like it is definitely working for you.

I'm no expert, but I know asphalt is usually cheaper than concrete.

Through the closing process I kept hitting the pavement with my relator trying to line up another deal in case this one falls through or I stumble across another MLS miracle.

Pounding the pavement, passing out cards, networking with real estate professionals, etc...

Pound the pavement, knock on doors, look for dilapidated properties and so on.

I believe that an asphalt based coating would be contrraindicated on a "rubber" roof?

The only way you can find out is if you hit the pavement.

I've already made several improvements to the property including new gutters, french drainage system, some moderate plumbing work (shut off valve installation), repair and resealed asphalt parking area, and updated the units kitchen and bathroom I'm living in.I'm considering installing insulation in the building via blown in cellulose/fiberglass, new windows for building, and new landscaping (currently there is none).