Yeah, it happens, even to the best of us... we had several betta bowls when I was a kid and they never made it more than a year. I've got 2 bettas now that are approaching 2 or 3 years old and a 3rd we just picked up. Kept well, you can usually expect 3 to 5 years.
You can pick up a "proper" setup for fairly cheap; especially by building it yourself vs buying a kit, same as snakes. 5gal tanks are around $10 new (2.5gal not much cheaper usually) and lids are similar, though a sheet of plexiglass to prevent a jump out works too, or really anything you have around that won't mold or mildew from humidity. I use sponge filters for mine, around $5 for the sponge and $10 for the air pump to power it. If your room is in or stays in the mid to upper 70s, you can leave a small heater for later. (Also probably around $10) that's around $35-45 total, maybe more if you want new substrate/more or other decor to add in.
I can link to any of the stuff if you want, but most is pretty easy to find, and even sold at most of the pr stores (Petco tends to have the glass lids more regularly, and tanks themselves vs PetSmart in my experience)
Pic of one of my early renditions of a 5 gal betta tank. Shows the sponge filter and that was a larger than needed (wattage) heater, but since it was adjustable it worked fine. Smaller ones work just as well for that size tank.
Sent from my SM-G950U using Tapatalk