Not too long ago I broke down a the costs between Ableton and bitwig, and they are quite similar over time.
Ableton has the big #'rd updates where as bitwig you get all updates within a year from license activation.
Since BW will still run after the license runs out (you just cant update to any new versions) I don't always update until there is a new feature that I want to work with drops in an update.
I also limit purchasing licenses to sale periods as a license can sit on the shelf until you're ready to activate it - this significantly reduced the cost for me.
I think there are other ways to go about this though on the vast sea of the net if your sails catch the wind right ;). If you're making stuff for fun and not for profit I think everyone should have access to creative tools.
If you make money than it's worth considering sending some. money their way. ¯_(ツ)_/¯
RE: Audio stuff I switched to bitwig long before I switched to Linux. Having familiarity with a DAW that ran natively was awesome; I also had a lot of plugins that ran as windows only VSTs. Yabridge + Wine was the answer.
You do have to downgrade wine to an older version (but this also helps you learn some Linux stuff) and works fairly well. I can even run omnisphere through yabridge (I do have a wild desktop tho so maybe not. the best point of comparison).
Mint is the first distro I used and most everything was really easy for getting audio stuff up and running quickly. I'm now using Garuda which I mostly like; there are issues that I'm still trying to work out.