Before I had much of a gear budget I splurged on a set of Sitka mountain pants and blew them apart in two weeks of scouting trips. I ended up picking up a pair of sportsmans warehouse brand pants. They were polyester with an ok camo pattern and they lasted the whole season with no issues at all. Cost was about $30. I prefer higher end pants w/ 4way stretch but can't say that I would be any less successful if I were still wearing them today.
For all you archery hunters out there. Here is a great place to find deals on archery equipment among other things. It's a great archery forum to get information.