"How many illegals were getting FHA mortgages?"

Nobody knows; maybe none:

FHA loans offer government-insured mortgages to ensure that lower-income individuals have access to home ownership. While illegal immigrants are technically ineligible to obtain FHA-backed home loans under U.S. law, HUD's announcement will strengthen enforcement mechanisms to ensure that illegal immigrants are not abusing the program in the future. It is unclear how many illegal immigrants have obtained FHA-backed loans."

PS I won't be surprised if the DOGE boys end up cutting back or even eliminating the FHA mortgage program that Turner is supposedly making sure illegals don't gain access too.