Distance between driveway regs.  

But where there are large sums of money present, there is opportunity for decisions to be made that are not in the best interest for the LPs - and given the distance LPs are from a typical investment - you are at the complete mercy of the GPs as to what you know or learn about your investment.  

If you don't want to long-distance landlord and find it to be a pain, then sell it, 1031 exchange it or owner finance, like you mentioned.

It's importnant to understand the market in philly as they can be hyper local and can change drastically over short distances. 

Bigger Pockets is a great place to learn and connect with fellow investors.If you’re looking to invest long distance, I definitely recommend building your core-4 team.

Luckily I kept my distance and focus more on the traditional ways of making money.

I work for General Dynamics Electric Boat which has decades long contracts with the US government and the turnover rate is relatively high in the company so my thoughts are if I could choose a place that is within commute distance there and within the price range of the average employee that maybe that could be a great idea but I want to know if people think that is too much of an assumption and risk to make?

But, for the best potential tenant pool, I would suggest looking to invest in neighborhoods in close proximity to hospitals, colleges, local markets, easy commute, provide sense of safety etc.

The soil or the hard surfaces should slope away from the building to a distance of at least six feet, to keep moisture away from the footings.

Not to mention trying to do this from a distance.