Dwindling tradition, weird hobby or join a friendly band? You don't really need to spend money to recruit ringers. As I mentioned earlier, I found 4 recruits by talking about ringing for last year's Royal Jubilee on the local FB page. On a previous occasion I arranged to put a small display in the window of a regional building society - they like to have something unusual to attract attention to their otherwise rather bland savings adverts.
Our tower is quite accessible. Most summers we have a tower open day in August on a Sunday afternoon. There is no attempt to recruit although we usually have plenty of promo material on show and often run a very brief Ppt display on an endless loop. Visitors can visit the bells, see the clock mechanism and, in small groups, go on the roof to take photos across the roofs of the town. Then a few weeks later in early/mid September we will have a recruitment evening with ringing demo's and an opportunity for visitors to try their hands at a few pulls. We quite deliberately say nothing (unless asked) about change-ringing as we don't want to blind them with science.
We have has up to 180 visitors on the Sunday afternoon Tower Open Day; up to a dozen or more at the September recruiting night and most years we win two or three new recruits who stay the course and join the Sunday Service band. Probably not many towers are as accesible as ours, but most should be able to work out a local variation of the plan to suite their circumstances.