upping the rent

[AraBella Hannum]

I am looking to buy a small apartment complex (5 units) in FL and with this particular complex all of them except for one are month to month and they are very under priced for renting around $200-$300 under a fair renting price. How would I be able to raise the price/ go about it to see if the current renters would like to stay there if they are willing to accept the new rent price?

What are the laws to changing the renting price in FL?

How many days would they have to leave the property if they are not willing to pay the new rent price?

Is there anything I can do about the one that has a lease agreement for another few months?

Thanks in advance!