As a WordPress developer, I do not use paid themes. I do not believe if you are hiring a WordPress developer, that you should have to pay a continuous license to keep your theme up to date, same goes for page builders. There is no need to pay $100s of dollars a year for a page builder when WordPress has it's own block editor. I have always built custom themes my whole career and I find that paid themes are coded in a very bad way with tons of bloat. They typically do not incorporating into WordPress natively and just writing code on top of WordPress, or forcing website owners to use specific plugins for compatibility.