I'm starting to lean more towards FIU. I had a long talk with my boss yesterday, he went to UM and graduated Magna Cum Laude but hated it. He says they will overcharge you at every opportunity and treat you like a number, at times it seems they're working against you. He will have paid a total of $269,000 in loans back when you factor in interest. That's friggin' crazy!
While I have no problems with FIU (I received my undergrad there too.) I wouldn't be able to justify picking that school over UM. FIU will be graduating their first law class this year. Additionally, there are not many hiring partners that are familiar with the quality of education that FIU offers. When you graduate, you basically will only have 3 years worth of alumni that can vouch for the program.
In the long run though, I do believe that FIU will surpass many of the schools in Florida. It does offer a huge cost advantage, plus the benefit of living in one of the top legal markets in Florida. I just wouldn't recommend going there right now
Did you get accepted to any other schools that can give you in-state tuition? If you are concerned about price, perhaps you may want to consider those options further.