LUCA makes $58,000 per year, is single, and lives in Seattle, WA. He has $27,000 in Direct Unsubsidized federal loans, but he’s got another $62,000 in private student loans and lives in an expensive neighborhood, so his rent is high. He’s hoping to keep his Federal student loan payments to less than $200 per month for the first few years so that his budget will work out.

What is a potential downside of Luca's taking this loan repayment plan that works in his budge right now?