Can my fiancee and I get married if her I94 is expired?

My fiancee is from the UK and we live in our home in FL, she has an E2 visa for 4 years. Every two years you need to leave the country even if it's only for 24 hours to get your I94 stamped. Being as times are really tough we couldn't afford to take an international trip. As such her I94 is expired. We tried to get her a valid ID so we could get married and the DMV won't renew her license until her I94 is updated. We still can't afford to leave the country, hence why we wanted to move the wedding date up so her status in the country wouldn't be jeopardized. But it's a catch 22. Now we don't know if we go down to get our wedding license if we show them the expired I94 if they're going to call immigration. I may be over reacting, however what you need is a lawyer for answers and we just don't have the money. Worst part is we'd have the money if she could work, if we we're married HaHAha! Anyways I'm hoping someone will know out there.