Danny...my advice is that, if you want to save some money, save it somewhere else other than boots. Nothing will ruin a day of riding faster than hurting feet.
On that note, look at boots from a manufacturer that's been around for a bit, even Sims, Lamar or something like that. By focusing on their higher-end entry level boots or their lower-end mid-level boots, you're bound to find something that's comfortable and won't cost you too much.
Oh, and ALWAYS test fit the boots live before buying.