I am still unsure if I truly want to hire a property manager, or if its something I can do myself. 

Besides Showmojo, there's also TenantTurner, Rently, Showdigs, ShowingHero, etc.You can also just hire an agent or PMC to do a tenant placement.

Looking to hire a PM for my out of state rental.

It's likely that the contractor they used to hire to remove the tank didn't close the permit with the township.

Working/hiring workers from 3+ hours away can be challenging.

Working/hiring workers from 3+ hours away can be challenging.

As for the 10% fee for overseeing setup, I understand this is in addition to the cost of hiring someone to physically set everything up.

Either be active in management or hire a reputable PM who can satisfy this role.

Either an in house maintenance person with HVAC certification or you have to hire out subs for the various jobs.You can always contact PM companies and ask them what they budget per unit for maintenanceGino

Once you've scaled to 40-50+ units, then you could hire an in house PM and that could cut the costs.