I hear you! I've only been on a couple of interviews, and I'm broke. It was really expensive for me to get there, for almost all of the dates that were available. Kept trying to make it work but ultimately decided to drop my interview because didn't know how I was going to afford it.
I'd say, think about your financial situation, how much you'd think you'd like to live on Long Island, like Hofstra's PBL curriculum, etc. to decide if it's worth it to you. I know that's a hard decision to make without having an acceptance yet. But with all the interviews you've got lined up, I'd imagine you're likely to get an acceptance somewhere. But if you think the school might be a great fit and somewhere you'd like to go, if you have the money, why not attend?