On-campus interview - no travel reimbursement?

Hi folks- in a bit of a pickle here: I (NY) applied for a Director level position (FL) and completed the first round of recorded video interviews last week. Today I get a call for a final interview (yay!), but here's the catch... It's in-person, for one hour, and they're not reimbursing my travel expenses. The hour will be me giving a PowerPoint presentation and answering questions from the panel in attendance. I really like the opportunity, but to spend $500+ for same-day flights booked last minute on a "maybe" seems like a lot. I'd love to get some feedback on what y'all might do in my position. Any advice is appreciated. Many thanks!!

Update: Even after asking for reimbursements (again) and an option to complete the interview presentation virtually, the institution remained firm and is unwilling to accommodate. It's unfortunate, but I have to withdraw my candidacy. $500.00 on a "maybe" doesn't make sense. Yikes!! Thank you everyone for being a good sounding board!!