Sadly, I think that maybe you are right.
Our hen with Bumblefoot recovered and was fine for about 18 mnths or so. Recently came back and we have taken her for more vet. treatment. If it returns again we will dispatch

I think you can home treat but ours needed antibiotics so had to visit vet anyway for these and they didn't charge much for cutting open the foot etc. Wound has to be kept open for a few days to allow pus to drain. We tried for a day or so to soak and drain the quails foot but the infection was spreading quite quickly and it we decided that it was unfair to continue to treat and kinder to dispatch. You could have a go but they aren't as easy to handle as hens and get very stressed.
Good luck with whatever you decide.