I do the bulk of my training with cheap birdshot. Low recoil 00 buck is expensive these days, like $1 per round. ammoman.com has federal low recoil 00 buck for $189/250, no shipping charge. Probably the best you can do for that ammo.
You can get 25 rds of birdshot for $5 at most sporting goods stores to practice with at realistic defensive distances, so bulk prices should be even better. Pattern and practice some with the expensive stuff, most shooting with cheaper stuff.