This is so cool! I live in Houston and make a dashboard every year to help friends/family/colleagues find comps and negotiate their property tax rates. I had thought about direct mailing out drafts of info packets to people as a side-hustle, but never put in the work to make it happen.
Nice, it would make a great side hustle if you have a flexible enough job to attend the hearings! Or if your angle was strictly preparing packets for homeowners to attend their own hearings. I say go for it