There are plenty of ways to get a straight razor sharp, cheaply, and easily.

Have you heard of the mouse pad method? You place various grits of sandpaper 600-2000, on a piece of mousepad and strop it. There's a lot info on this method online. Then you can strop it on a old leather belt with some compound/polishing rub (which you can get cheaply from sears). And since the razor is straight, you don't have to worry about turning the blade, just keep it straight all the way through!

This method will work for your knives as well.