I'm thinking of refusing to keep paying my daughters expensive guitar lessons even tho I "forced her" to take them 10 years ago
Why would you not just ask her to stop the lessons?
I can't. She's too stubborn and I'm tired of these expensive wastes of time
I think, as a parent, you need to support her passions. If the costs is an issue, try to direct her to free online resources, or cheaper local alternatives.
I'm going to use my money anyway and she can suck it.
If you wanted her to get into it, she got into it, and now loves it for almost a decade, why ruin it? You can find ways to make more money if it means helping your own daughter follow her passion.