In Philadelphia the fundamentals are strong: leading industries/employers are in the Education and Medical fields which are known to be stable, proximity to NYC and DC, national airport, port city, affordability compared to mid-atlantic predecessors.

With that said, I've done some research on the market and found the following information helpful in my considerations for Phoenix that you might find helpful as well:  Demand for both buying and renting property remains high due to the city's strong economy and growing population. 

@Amir PortalStarting the BRRRR strategy in the Dallas-Fort Worth (DFW) area is a smart way to build your real estate portfolio, especially with the area's growth and rental demand.

Here are a few areas I suggest you look into:-McDonough, Conyers, and South Fulton: Steady growth and aren’t oversaturated, positive demand for MFRs.

Prices remain relatively low, but appreciation may be slower.Monroe: A mix of cash flow and appreciation potential, Monroe has become a popular choice for investors, especially in areas where new developments are popping up.Appreciation-Focused NeighborhoodsBallantyne: A well-established area with high demand, Ballantyne offers excellent long-term appreciation potential, though cash flow opportunities may be limited.South End: A booming urban hub with a vibrant retail and restaurant scene.

Research Kyle, TX's rental demand, local regulations, and HOA rules.

With a large student population, a growing job market, and people looking for affordable housing, rental demand remains strong.

NL is close to both 290 and the Pink Line, and close to the Medical District, great for medical staff and possibly traveling nurses.

Trying to find out if there just isn’t the demand, or so much demand that the available units are rented so they don’t show up.

Like these illegal immigrants, those will deflate multifamily and single family demand.