Been here...we tried forever to find a guitarist for our 80's band startup. Finally, I advertised the gig paid $75.00 and got someone. There was no pay for the gig to the band -- the three founding members each coughed up $25 and funded the guitarist for the first gig. Told him he only had to show up for a rehearsal when we had a gig.
If you have gigs that pay, the good players will come out of the woodwork. The problem with your ad is that it advertises you have nothing on the horizon. The really good players don't want to spend all year in the basement -- they want to be out playing and earning money.
What I would recommend is this -- hire someone to play lead on three recordings. Let them use a generic kind of sound like distortion or clean/reverbed or chorused sounds. Use the recordings to book a couple gigs two months out. THEN advertise for a guitarist indicating there is pay and gigs on the horizon.
The good players will come out of the woodwork. I have done this before and it works. It also helps the band see how marketable they are. Plus, it displays who is serious about promotion, and who isn't, in the band.
Also, it provides incentive for the guys in the band to book gigs because they don't get their rehearsal fix until they rustle up some gigs. There is nothing like gigs on the horizon to attract good players and energize the band.
Without sales, nothing happens.
"I think, therefore I jam"