You might find someone here who can answer this question but I think there will be more people who monitor those other areas. 

I have been monitoring the MLS, loopnet, craigslist, ect for months and have made a few offers only to be outbid by cash offers.  

Without boring you with a ton of details, I began a renovation on a mostly occupied building, with a fairly educated budget, an arsenal of tools that would make Bob Vila jealous, a 360lb back squat max, and a belly full of piss and vinegar.  4 months later I am crabby, exhausted, carrying some credit card debt, consuming espresso like water, and just want to lay in a hammock for 3 days and drink myself to sleep until its time to lift weights again, and think about a better way to live.

A good Realtor that understands REI principals and knows where the bones are buried as far as where to find good deals and cash buyers in a local market is well worth their weight in gold. 

Security is your #1 issue, at the time of renting, and for monitoring/controlling access.

The major expenses in building a convenience store gas station.Gas PumpsGas tanks (usually 3)Tank monitoring systemLeak testing systemGas console (control system)CanopyWalk in cooler/freezer Including 15-25 glass doorcompressor x 2considerable regulation, DEQ BS, ect ect..Are you planning on developing and leasing the property, or develop and operate?

If they are up-charging for repair coordination you can always see if other companies do not.A good property manager is worth their weight in gold.

This is worth it's weight in gold.

If you are going to self manage, how do you personally weight managing one building vs. two?

That's a weight lifted.