A place to live that a working family can afford.
Our daughter is going to grow up in a Rapid City where young working families can rent an apartment without two roommates, and eventually buy a starter home. That isn't the city we have right now.
Property taxes are climbing, rents are climbing faster, and Pierre's answer so far has been to shift the burden onto a sales tax that hits a young family's grocery run harder than it hits anybody with a second home. I'll push for real property tax reform that doesn't get paid for at the checkout line, steady state investment in workforce housing so Rapid City can build what it actually needs, and protection for the starter-home market, not more giveaways to out-of-state developers who leave town with the profit.