My friends dad has cancer and I had a similar moment about a month back of just wanting to pay it off and put it to rest essentially. Even in Canada the expenses are insane, even with 80% drug coverage the expenses were thousands a month. Lucky for us the pharmacist was really upset by the entire thing and got my mom on some experimental treatment instead.
I checked up on how the gofundme was doing and it looks like they just need 25$ more, it turns out there are lots of other generous people in this world that can be relied on. The whole thing really probably says more about my need to fix everything on my own than it does anything else.
Maybe give something now and check back on how it's doing in a week or two ? I don't know, you'll figure it out.