You haven't given many details so it's difficult to give you a quality answer for your situation.

Take for example the lack of productivity where construction projects often experience time and cost overruns, rework or quality concerns. 

Buy good quality things once rather than poor quality and pay multiple times to replace it.

That could mean poor tenant quality, which could lead to them not paying or eviction.

I have done a lot of research the last few months and have gotten myself up to speed pretty well so I'm not looking for a lot of free knowledge from a realtor.

They've placed a tenant just recently so it's too early to tell the quality of the tenant.Hope this helps!

Buy quality, if that means every 2-4 years not annually so be it.

If you flip your flooring upgrades and appliances will probably need to be of higher quality vs a rental.

The best way to estimate expenses is experience and knowledge of your specific asset type and market.For vacancy, that will depend on your market and the quality/desirability of your type of unit.

Not that that means anything good or bad :-) But if you want high quality genuine coaching about investing in Philly and at a reasonable rate, I can  connect you with a wonderfully savvy, professional investor who does coaching.