Opportunity zone fund minimums vary by fund, and accreditation requirements are a separate question from gain size
Minimums for opportunity zone funds are set by the individual fund manager, not by the program itself, which is why one account might cite 250,000 and another 25,000. Both can be accurate for different funds at the same time. On accreditation, most opportunity zone funds are structured as private securities offerings, which typically restricts them to accredited investors. The program itself, the tax deferral and basis step-up on reinvested capital gains, is available broadly, but the vehicle used to access it is usually a private fund with its own investor qualification rules, which is why fund pages ask for accredited status before showing details. The size of the gain being reinvested does not affect the minimum investment; that is set independently by the fund. It does affect how much of the tax benefit is worth pursuing relative to the fund's minimum and fee structure.