Large lawns such as those found in Industrial Parks are ideal to start on
because the grass is cut regularly throughout spring and summer, yet they
don't usually get much foot traffic. City parks are usually more "contaminated"
with lots of different scents (and as such are better for training for Urban Tracking). Farmers will often allow responsible trackers to use
their fields after the hay has been cut, as long as they ask permission.
Basically, you can get into tracking for under $100: $25 for a
harness from Wal-Mart, $20 for a long line/leash, about $40
for a book, and a few dollars for stakes. A four wheel drive vehicle is nice for getting into (and out of) the fields... I won't tell you how much you'll spend on gas...