The conclusion could be that, while you might get a higher (or less low) return depending on the kind of property, your return will likely mainly be determined by what the market does as a whole.

Any advice on seeking property management and maintenance work in New Jersey?

To be fair it had been improperly managed for about 10 years prior to me buying it and so the existing tenants were not getting any maintenance work done and were therefore paying 1/2 the going rate for rents.

This will have a significant impact on your loans, especially on lower balance loans or loans with low payments. 

I manage an asphalt maintenance company during the day but would like to build a rental portfolio and eventually get into flipping full time.

You can check HomeWyse.com to see what the going rates are for maintenance items in your area.

As a business owner myself, I would not want to claim association with, let alone endorse a low-quality company with deceptive business practices, like WealthAbility – it just reflects poorly.

This likely means your late fee is too low in proportion to rent. 

From what I know, it's a stable, growing city with very low vacancy rates compared to the rest of the country.Hilltop is not an area I am very familiar with yet, but from what I have heard would have mostly "C or D" neighborhoods.  

Running materials to job sites and checking on progress, and then I learned it again going to check on a problematic maintenance issue and viewing vacant homes that needed turn-renovations.