This bill does rely on a lot of debt, that part is scary from a standard economics point of view and wasn't a part of Reagan's economics plan, but if Trump's gamble works like Reagan's did, cutting taxes and Trumps DOGE plan should let people buy more, and benefit the entire economy.
I don't think Trump wants to use that new debt ceiling, but wanted a big raise in the debt ceiling so he wouldn't have to rely on Congress every few months to raise it if needed to continue business. I think one of his goals is to grow the economy enough that tax receipts will pay for necessary Federal govmint... but that'll probably take most of his term, thus the need for that raised debt limit.