On the inspection part, the wholesaler's likely concern is the time frame of the transaction.

As others have said, this might best be considered an inexpensive education. 

Not sure on the time frame, but if someone is going through an eviction currently and its their first one, and you screen them, its not going to show up on your screening until the first eviction is finalized.

All in expenses are 2,130 giving us a profit of $300/month.

Put ALL the contingencies to get out of the contract, at many different stages, and, at time periods.Keep 45 to 60 days just for inspection and then to get proper estimate from contractors to fix with time frames. 

Otherwise books, podcasts and videos are inexpensive and often free, take advantage of that.

l...Also, shell and gravel driveways can be quite attractive (and inexpensive) if mixed with (regular old Home Depot) pavers or lined with them. 

Anyone in the New castle County or Kent County Delaware area have a good inexpensive cleaning company with fast turn around to recommend?

After reading up on the quality and endurance of windows manufactured from 1940 and before, it is apparent that people too often replace them as a matter of course with modern windows that are both not inexpensive and are far inferior to the old material and construction.

Not ideal as they are listings and based on the seller's unverified information, but at least comparing enough properties should point you in the right direction.CoStar COMPS is the best product for market rents, vacancy rates, etc. but also a not inexpensive subscription service.Good luck!