There are a ton of courses you can play in the Orlando and Kissimmee area, but for the most part the quality golf courses are fairly expensive. There are a few courses that I have played that are pretty decent tracks that you can tee it up from between 45 and 65 dollars a round depending on what day of the week and when your tee time is ....
Ventura Country Club
Shingle Creek
Grande Vista Golf Club
I've also played these and highly recommend them, but they will cost you anywhere from 85 to 125 dollars a round. Tee times can be a little harder to come by on these especially on the weekends so I would try to book in advance.
Eagles Creek
Falcons Fire
North Shore Golf Club
You can play Hawks Landing for around 65 bucks if you don't mind teeing off after 1:00 pm, it's over a 100 bucks in the am. It's a great golf course and well worth the pm rate to play.
If there is anyone in your group that is an Orlando resident you can usually get the Orlando local residents discount, or if anyone in your group is simply a Florida resident you can sometimes get a Florida resident discount, a lot of courses there offer these and they can save you a little money.
Enjoy and hit em' well !