At my gym, masters swim is something like $60 (for a member) for 6 or 8 weeks, and I can get 6 or 8 lessons for $85 (as long as I find a buddy to sign up with me, it's more if I do one-on-one). A friend of mine and I did this, and got more individual attention and coaching at not much more cost. You might have to shop around. If you can switch to adult group lessons, that does sound like a better fit than masters swim where they just want to give you a guided workout. I found that only one lesson a week was good enough for me, the other 1 or 2 times I swam during the week it was nice to not be coached and get more different stuff in (I'd have 1 coached lesson, 1 endurance swim, and 1 drill-focused swim).