If you think it might be too much, hire out.. it's 10-15% but then you won't have any stress and it will just be straight checks.  

I KNOW I SHOULD pay less, but that siren song of easy, low stress positive cash flow just sounds so good.

I can't stress that enough. 

If so, maybe less stress but I would still give them a deadline.

Most today are buying a stressful job (landlording) and not even getting paid for it.Rent to value ratios in my market have been too low to buy off the MLS for a long time.In some markets the R/V ratio is still good, but appreciation will most likely be less, reducing your overall IRR.On the commercial side, cap rates have been compressed to about the same return as AAA corporate bonds. 

Consider these following neighborhoods...but at the same time, there are a lot of macro economic factors that could derail their status...also my biggest advice is to always plan conservatively on your ARV and Comps:- Port Richmond - Kensington - Mantua - Fishtown (almost saturated, hard to find deals)Fringe Up + Coming Neighborhoods:- South South Philly- Strawberry Mansion- Norristown (suburb)Again I would stress it is so important to look at every property on a case by case basis...you make the majority of your money with your purchase price and reverse engineering the after repair value. 

Once the market direction is changed (not happen yet), sell a few properties instead of all properties, to have enough reserve to pass stress test of 30% to 50% rent reduce.

Personally, I feel that being debt free (or at least debt free-er) allows for much less stress as well as the ability to save faster.

While private money is always better because of the low or no rates/fees.. they aren't without their own stresses and headaches. 

[Can't stress that enough!]