"I've known for a while that I could get a spot at my local FC if I was half as good a guitarist as I am a singer."

I think you just isolated the problem. I can't think of many solo unaccompanied singers, no matter how good, who I'd listen to for 30-45 minutes. Why not get together with one or more musicians and sell yourselves as a duo/trio/band?

I played around clubs, singarounds etc. for years before, with mrsleveller, we suddenly got several gigs. What it made me realise was that I wssn't good enough even to be a support to a pro folk musician - so, with a sigh of relief, I went back to the floor spots and signarounds which, I've realised, together with a bit of amateur home recording, are really my natural habitat.