spend the cash to get you on the water more. a board will not make you a better rider. you have to ride. just make more of an effort to get on the water and it will happen. i work, go to school, am broke, dont have a boat to use, and the nearest place to ride is an hour away yet i still make it out 3 times a week in the summer and usually once a week or more in the winter. i used to never ride, but once i put in the effort and met people off wakeworld, norcalwake.com, and wakeskating.com i started riding much more and progressed so much from riding with guys who loved it as much as me.
you cant buy insta-talent