We went to florence from Rome, and reached at night . The room costs are really high , and at least 20 Euro per person per bed is the rock bottom you could get .
The city of florence is quite vibrant , and you have to have sufficient money if you are thinking of staying here longer , as its probably the costliest city I came across in Italy , after Rome .
The main cathedral in the city center gives an awesme view . go to the top of it .. its like 400 + steps , and by the time you are midway , you are totally exhausted .
However the view from the top is quite relaxing . Since Italy has warm climate in June , I would recommend you to go this time of the year . The city of Florence has very vibrant night life , with shops and local vendors elling stuffs until 12 in the night .
Near by is Pisa , so you could visit Pisa by bus or train . And if you want to go to a beach , then theres one near Pisa . On a hot day , attendence on the beach could exceed 2000 people . Its a really nice beach , although the beach has ot much sand shore . Still the place is great . And of course in Pisa you have the Tower of Pisa . I was astonished to see how much it has bent over the years . Entry to the top of it was 15 Euros , so I left out , beside its not so tall . But it really has bent a lot . You would be really surprised if you have seen it .
On the whole , 1-2 days should be ideal to move around Florence & Pisa