Mortar is not air-tight, so you may or may not want to move in next to someone with a smoking habit.

Check when/if it was last rehab'd as that's when the clock is likely ticking down on bigger ticket repairs (e.g., hvac, windows, roof, repointing, etc).

Rowhomes roofs are flat which typically are more costly to maintain. May need to at least be resurfaced every 10 years. Check for any evidence of water as indication of needing maintenance.

Rowhomes on ends are great, but do get a brunt of trash cans, illegal dumping, attention from artists, etc., and electricity bill will be a lot more (maybe double) due to no insulating neighbor.

Expect a usable parking pad to increase value/cost $50-75k.