Juan:
Diana's recommendations are totally spot-on / correct. A county level tabulation on households by owner/renter tenure by race/ethnicity of householder by household income level, is just not (directly) available from the ACS.
I would recommend using iPUMS to obtain your data (ACS 2015-2019, 5 years PUMS). You could re-code race/ethnicity of householder into black/non-hispanic, white/non-hispanic, hispanic (any race), etc, and recode household income levels to whatever income groups make sense.
Geography in PUMS is tricky. The iPUMS people have done an amazing job: you can obtain PUMS data for LARGE counties (100,000+) population where the PUMAs nest within counties. So, you can get county-level PUMS estimates for the 34 largest counties in California. The other 24 counties in California are grouped together in what I call 7 super-counties (e.g., Mendocino + Lake Counties; Monterey + San Benito Counties.)
iPUMS is an amazing, wonderful resource. I wish it was around when I started my career 40 years ago!!