You're in Winter Haven, right? I used to live in Lakeland. It's great weather.
I think you'll be fine. The Florida sun is so intense that I think less than full sun would still work.
I haven't grown dwarf tomatoes, but with container growing, the biggest costs for me are the container itself and the media (I'd say "dirt," but there is no actual dirt in it.) You can use anything as a grow container - generally, the prettier a pot is, the more they gouge you on the price. A 5-gallon bucket works if that is all you can get. If you are making drain holes in a bucket, put them about three inches up from the bottom, on the sides. That gives the plant a water reservoir to help prevent drying-out and regulate moisture.
As for media, don't skimp. Don't use "potting soil." Look for "pro mix" instead. It comes in a compressed square. I pay about $3.50 per cubic foot. A 5-gallon bucket is about 2/3 of a cubic foot.
Finally, fertilizer is another area not to skimp too much. Everybody seems to fertilize differently. I really like Osmocote time-release fertilizer:
http://www.amazon.com/Osmocote-27540...words=osmocote
There are other brands of the same stuff, but it's easy to use and gives good results. I also used Epsom salt and molasses, both of which are cheap.
Good luck with everything. I think you will find that is easier than you think
