Make your own sugar/borax trap - https://www.mashupmom.com/yes-borax-got-rid-of-the-ants/
As a preventative, I've left a dusting of borax by my base boards.
And the Borax is god for cleaning and washing clothes.
Recall - Ronald Reagan used to hose a TV show in the late 50’s sponsored by 20 Mule Team Borax (same stuff)
I have used that recipe before and it works. I poured it around a fire ant hill and it did some damage but you still need special stuff for them unless someone has a good fire ant home recipe.
That’s essentially the right recipe, and it sure as heck is cheaper long term than buying Terro (which is a good product in terms of effectiveness, but it must be making the maker a fortune!) However, the cotton balls are messy and leave bait behind to clean up. We clean out & refill Terro “traps” or use our own — which can be almost anything that will hold a little of the bait, stay in place, and ants can easily get into. I often position a partially flattened soda can outside out kitchen wall such that it is in shade, rain doesn’t get in, but the ants can. Rocks, etc., can help keep the can in place, and this will hold a couple oz. of bait: Months’ worth.