Jason, we are in Florida as well. I wasn't aware that VPK was only a half day, but I'm not terribly surprised. I suppose it will help with the transition before kindergarten.
How do you like the Montessori school? We would like to use one but am not sure we can afford any around here. I know they would get vouchers for VPK at least but am not sure if we'd still have to pay on top of that.
The VPK program is 540 hours for the school year, I think around 300 if you do the summer program. It follows the school year which is 180 days, making it 3 hours a day. I do think there is a 6 hour version, but it is much shorter at around 90 days. I do think they allow those who provide VPK to setup a few different style programs.
I love the Montessori school. Do your homework on the schools in the area. There is an association or certification that the schools can get. Not all schools calling themselves Montessori are certified and some can use the name without really following the teaching methods.
The school is not priced that bad. I've known others who pay more for daycare. However there are some other costs involved. We help provide snacks for the class, which is on a rotation method. So when my daughters class only had about 7 people in the class, we had to bring snacks in every other week. There is also a 10 hour time per year we must help the school. This can be done by watching kids on the playground, field trips, book fairs and other ways to help around the school. My brother used to do the box top program since they both worked during school hours. My wife does field trips.