you could afford a more premium brand of tent if you bought used. The best thing about buying used is that you could still sell it for the near same amount you bought it if you didn't like it at the end of the season. If it was a good enough price for you to buy used then it will be also to somebody else. It gonna end up dirty anyway. try
craigslist classifieds: jobs, housing, personals, for sale, services, community, events, forums . There was a thread about family tents before so a search might provide more info.