I guess the tail wheel experience could come in handy for being a tug pilot?
Not really. Depends on where you want to tug, obviously, but a lot of clubs are using nosewheel type tugs (Rallyes, Robins etc) I actually got my first tailwheel experience on a tug after a season flying the nosedraggers, kind of a reward for being a good girl and turning up to tug on days when I would have much preferred being in the glider. Ok, I now have a lot more tailwheel time than nosewheel but that's because I bought a cub!
But beware if you get hooked on gliding, you will end up wanting to spend a lot of time in the glider, and while ten grand will indeed buy something reasonable, the launches and parking are not free.