I think those ones you linked to would still need a cover.
Prefolds and covers are going to be your cheapest option. The brand of prefolds I used is Green Mountain but Little Lions are popular too and they are cheaper.
Chinese Indian Prefolds cloth diapers They are on sale right now, I dunno about the sizing but it looks like you could get a dozen for $20 or less. Then you would need some covers as well, I would scope out and buy some used ones on the Cloth Diaper board or on Diaperswappers.com. Thirsties are very popular. Again, I'm not sure what size you would need.
Also check out this site
Miracle Diapers, Inc. Reservations It provides cloth diapers to help you get started if cost is holding you back. It looks like they aren't accepting applications till Aug. 15 but I would for sure apply once you could! I think they've helped a lot of JMers get started on cloth diapering.