I think I will have no luck rehoming it? There is no one around interested in things like this. The pet stores suck around here. Any advice on how I could go about doing that
What is in the 2.5 gal with the weather loach? Do you have gravel and decor in there? Could you move that gravel, decor and the filter into a bigger container? Don't wash it, scrub it or let it dry, move it over wet. It doesn't even have to be an aquarium. It could be a large plastic storage tote. I'm not sure where you live, but I believe the last day for the Petco $1/gal sale is today. You could get a 40gal for ~$40, which is half the normal cost.
Regardless, you have to be committed to keeping fish. Regular water changes, measuring water parameters, etc. They can be a bit of work. If you're not up to it, it's best to try to rehome to a good home.