For this type of gig, I would only take one keyboard, an easy folding X stand, and the most basic pedal set up you can get away with. What I do with these things is set up the stand, and have the cords and everything ready to go do a line check with my electro, then take the keyboard off the stand and carry it like it was a “pet” lol.
but for 50 bucks? It’s not worth it. If someone spills a drink or even just bangs into it with the headstock of a bass guitar, you’re going to be a lot more pissed off then if you made two or 300 for the gig. Just my opinion…