OP has a full scholarship already at Ave Maria.
I misspoke, Citylaw is right... FIU and FSU both have about the same cost of attendance (assuming no or similar scholarships at both). They are each about $40k per year (20k for tuition and 20k for living).
assuming you are paying for your cost of living at all three places, you would save about $40k by staying at Ave Maria. That is not an insignificant number, but you need to figure out if FSU and FIU's benefits are worth it.
I agree with Citylaw, you shouldn't base your decision here solely on ranking. I mean, if everything was equal financially and you were going into this as a 1L and you could care less where you worked after and you had similarly strong vibes about each school, you could then use ranking as a good tie breaker. The reality is you would probably have a little easier time finding work coming out of FSU than Ave Maria in a general sense. However, those aren't your circumstances. I would transfer, again, if you have a strong desire to work in another schools specific region. If you want to work in Portland, however, each of these schools are going to be equally good and equally bad at helping you get a job there, so I would say go to the cheapest.
I guess what I'm saying is, we need more info.