Multiple Box Custom Search

I’m just about to pull my hair out, lol! I’m trying to build an archive/document for my family’s large photo and memorabilia collection. I won’t bore anyone with details but it’s very large with over 10,000 objects I want to document and put online.

Anyway, I do NOT want to buy some expensive archive software because I want this all to be available for our extended family to search and find stuff.

I finally figured out how to add custom fields and get them to show up on the frontend but I can not figure out a way (I’m still pretty new to PHP) to be able to search the custom fields. I’m looking for something almost like real a real estate plugin. Actually, at first, that’s what I used and I just changed the titles around to fit my needs but WP-Property doesn’t let you use tags for cross referencing so it’s just one thing after another!! I tried using Custom Search Field but I can’t get it to work and there doesn’t seem to be support for that plugin anymore. Anybody?? Help?? I’m willing to PAY someone to figure this out!!

Also advice on the site in general? Are the custom fields even the best way to do that? Let me know and thanks! BTW I’m using themia-lite because I really like the homepage setup.

Site is https://humphreysarchives.org – You can also see an example of an archive entry here: https://www.humphreysarchives.org/archives/158