These are all fairly common fees and common anounts.Have you tried to figure out how much time it would take to manage this yourself? 

One thing to remember with rent by the room is creating specific and direct rules when it comes to the common areas, because this is where the majority of conflict will arise.

@Robert ChaitonThere are two ways for more than one person to own a property.Tenants in common or as an Entity.When setting up the LLC, you want to discuss the following items1) Responsibilities for each member/partner2) Exit opportunity(5 years, 10 years?)

You can then fix this unit and any exterior/common area work.

Curious though, what were the $600 fees for and are they somewhat common?

This applies to any common expense, such as garbage or roof replacement.Another thing to consider is that expenses incurred prior to "in service date" are capitalized.

However, you could make them condominiums with common elements and could even convey partial interest.

In an apartment it is more common for tenants to pay electric only.

Also in NC my costs are ~$4k per year to be actively licensed and pay all dues, MLS fees, etc.My $0.02 is there are a million questions people try to wade through before buying their first deal and it tends to prevent action (not saying that is the case, but it very common for people). 

Also, for being a "General Contractor", a fee of 15% plus or minus 5% is fairly common in my opinion.