It was offered to a relative of mine as payment for services rendered, meaning we risk losing nothing here.

Owner said has long term tenant on one side of 9 years , building has had  great rental history.  600*2=1200 monthly1200*12= 14400 yearly taxes/insurance =2800 yearlyrepairs/maintenance 10%= 1440vacancy 10%=1440 14400-2800-1440-1440=8720 NOI20% down on 99000 @ 4% interest 30 years =19980 mortgage payment roughly 382 a month /382*12= 4584(NOI )8720 - (debt service )4584= 4136 monthly cash flowcash flow 4136 / (money invested) 19980 =20% ROIAm i missing anything here ?

Not jewelry, Computers, Guns, iPhone's, Dental Services, ….. just shipping and paper services.Now, one half of the building will be empty in about 40 days, so there will be a totally empty 1000 sq. ft. very nice open room / office available.

I’ve signed with a Property Management company with realty services.

They did not reply for 5 additional days and when they did, they demanded full rent payment and sent us receipts for the appliances they bought and the cleaning services they used prior to us moving in. 

I was wondering if you use any tools/services to manage your fix and flip projects?

Go to the search bar and look for "application screening" or "tenant screening" and you'll get enough to make your head spin.Generally, you want them to have a recent Landlord reference, make 3x the rent, and have a decent credit score.

Is this a service all GCs offer and what is the cost?

If your rent doubles you monthly P&I payment, than that property will have no impact on your mortgage application.

Apparently the database they use can't export lists to excel or csv so they forward my message to the software company and they sell it to me as a service...