As others have mentioned, Mini's are also harder to customize than AR's are.
That is very true. However, a customized Mini-14, done right, is a work of art. It doesn't look like a bunch of bolt-together junk, like many AR's do.
Check out some of these from Accuracy Systems: http://www.ruger-mini-14-firearms.co...ini_prices.php
Now, if I could only find a "cheap" Mini-14, it would be off to Accuracy Systems for mods.