Let's assume that the neighborhood is a C class and the median income of the city is greater than 3X of the market rent.Here are some of the considerations I've come up with so far:- Units are in need of renovation and capex is too high or not available- Unit quality is not the same as market - Seller is worried about losing tenants due to increase- Vacancy rates are high or filling units have been difficult- Rent increase would take multiple increases over multiple lease periods to get to market rate if seller is trying to retain the same tenant- Seller inherited property and just want to liquidate- Seller needs to liquidate quickly (financial burden, sickness, quick exit from land-lording)It seems like I might be missing a warning sign about a deal if they are selling with current rents that are under market; but again, this seems to be most of the properties I've underwritten.And in the same vein, what should I be worried about when purchasing a deal with under market rent with the intention of raising them after purchase. 

Honestly, why would anyone do that when the median house price of NYC is almost 1 million.

If you use niche.com you can pretty easily find median home values, median incomes, an some data pretty easily.

I do think flips done right and priced in the median move within a few weeks.

Household Debt Rose by $184 Billion in Q1 2024; Delinquency Transition Rates Increased Across All Debt TypesMay 14, 2024

ALL of my major problem tenants happened to have had a average (adults in the household) score below 625. 

Monthly pre-tax income for household (minimum $5000)7.)

San Diego 92154 has median income of 120k with price only 750k so it's pretty affordable.

We are looking into getting a fixer upper and plan to rent out our original residence ( Zillow says we can get $2700 median rent in our area ) while moving and fixing up the new house.

The median income is low but the amount of renters is high.