Siena or Florence

Hi, I am planning to spend 4 months in Italy starting June 1, Protected content . The main reason is to study Italian. At first, I thought I would stay in Siena. However, I have received advice that Florence may be a better choice for me for two reasons: 1) the schools are cheaper there, perhaps due to competition. Looking at the prices listed on the web sites of a few schools in both locations, this appears to be true. Protected content will probably feel less isolated in Florence. I am 60 years old so I will probably be significantly older than most of the other students. I will probably have to rely more on other expats for a social life and there are many more expats in Florence. On the negative side, I am told that Florence will be very, very crowded and hot and humid in summer and that the local people are not very friendly due to the great numbers of tourist passing through.

I would appreciate any comments on the comparison of Siena to Florence. Also, any recommendations for Italian language schools in Florence would also be appreciated.

Grazie
Sam