I feel like I'd like to see this as a scatterplot. Thought about it as a kind of 2x2, the four buckets are each independently substantively interesting. You might have low income/low cost areas... low income/high cost areas... high income/high cost areas... or high income/low cost areas. It'd be interesting to see how they compare.

Actually... just whipped it up in data commons... basically this:

https://datacommons.org/tools/scatter#%26svx%3DMedian_Income_Person%26dx%3DCount_Person%26svy%3DMedian_Cost_HousingUnit_OccupiedHousingUnit_OwnerOccupied_SelectedMonthlyOwnerCosts%26dy%3DCount_Person%26epd%3Dcountry%2FUSA%26ept%3DCounty