If you are just looking to save money, call Lancaster Archery Supply. Their custom strings and cables are the least expensive available. The prices are not shown on the website, but the catalog lists the highest price as $17.99 for an 80" + string and $10.99 for a split cable. Just like Henry Ford, you can get any color that you want as long as it's black.
I don't think that I can build them for that evenif I don't consider the cost of my labor and my investment in a jig.
If you want to learn to do everything yourself like I do, then the Little Jon string jig is the Rolls Royce of jigs. However, you can do it a lot cheaper than that. Larry Wise told me that his first strings were made with a board and 4 nails and that seems to have worked out OK. I use a piece of uni-strut that I got at Home Depot for $15 and two heavy bolts with a drill bit stuck in the ends with the smooth end of the shaft showing. I have a BCY tensioning attachment on the way, but I don't really need it. Total investmentless than$100.00.
The Larry Wise Basic StringMaking video is the best one for a beginner. It but you may also want to get the videos from Brownell'sor BCY. They will show you how to make two color strings. There is also an new video available from George Ryals that hassome goodtechniques thatI haven't seen anywhere else.
http://dvd.archerylive.com/ It's pretty expensive, but has a lot of other information about arrow building and bow tuning.