Did he show you any executed lease contracts, regular deposits or something proving the $450 rent history?

It will take some planning, diligence, and patience but it should be possible to execute something like this.

I have a company in Central NJ and we just charge a flat fee without any markups, or additional fees, but that might change in the future as we grow and need to hire more staff. 

Is it feasible to outsource the whole operation, including staff, and still earning on the business side?

To successfully operate parks at scale requires understanding all the unique aspects, having the experience necessary to create a strategy that works, and building a team and processes to execute. 

When you're buying of selling on a LO, there is no Down Payment since you're not buying the property until you execute the Option Agreement. 

Their value play strategy has been executed.

Electrical work has been nothing but pure joy to inspect, understand and execute.

Tough to say in this case you gotta know everything down to the dollar and also assess both your skill levels of executing the rehab and then deal with the sale.

They will be removed (paid off) when you execute the Option the buy....and the "owner" owns the property 100% from the time the sale agreement is signed.