"Cheap" tracking will actually probably do more harm to your car than good.
If you're going to pay to have tracking/geometry done then I can only recommend you get it done properly.
There is a thread on the Briskoda forums explaining about the different kind of tracking options:
http://briskoda.net/maintenance-performance/wheel-alignment-big-con/125397/
The majority of your tyre places tend to use very few measurements and it can actually end up causing more damage than it might fix.
Getting your car checked on Hunter's equipment isn't cheap (around the cost of a tyre) but worth it if you want your tracking/geometry to be as perfect as it can be.