I would assume a greater emphasis on quality of materials and workmanship (and consequently higher rehab cost) for a rental where the investor will have to deal with the longer term implications of any corners that were cut.

.: Quote from @Don Solt: Hi folks, As the topic states I'm looking to learn everything I can about the City of Philadelphia and its real-estate market.

I would also add, a contractor that you can buy materials for and they know how to put them in with little to know direction (reduces the management time of the project).

Here’s our OPINION for the Metro Detroit market (use as a template for your target area!)

Licensed with permits ~$3,250.HWT standard gas single family low efficiency without exhaust retrofit $900.Sand and stain hardwood floors, natural stain $3 per sf.Paint interior walls, ceiling trim and doors 3 tone paint scheme 2 coats $3.20 per sf (floor area cost includes paint)Click lock LVT flooring install overlay inclusive of prep and quarter round $4.50 per sf (materials and labor)Asphalt roof installation 3/1 - 800 sf bungalow with 2 layers of shingles - ~$7,900Standard porch cap replacement with 2 new precast concrete steps ~$2,500Used stove or refrigerator delivery and install $350New stove or refrigerator delivery and install $HD model specificUse this as a general guideline. 

Look to buy off market.

Mortar, paint & bonding materials deteriorate leaving cracks, gaps, etc. which can be concerning to look at, but this is very often addressed with repointing.

I didn't use it, but I looked at the marketing materials.

If I have the time after dinner to run to Lowe’s , and deliver material at 10pm, I didn’t have to ask if that’s ok.

You can break it out by general RE activities and material participation.