People get so confused about this.
You can not buy a house for taxes.
You buy tax liens, the lien only, you own the debt, but have no rights to the house.
After several YEARS of paying the taxes and trying to get the home owner to pay the taxes you can partition the courts for a foreclosure. You will have to pay any other liens (like their mortgages) but you can do this. The process rarely works, the owners show up at the trial, and takes years.
You should contact the housing authority to get section 8 if your wife is working.
But, there are no free houses. Real estate is big business in this country and no one gives it away.