The cheapest rack I've seen is a Body Solid rack for under $300 and that included shipping. Run a search on Google as different places offer different deals and different times. The specs say it can hold 1,000 lbs. Is it good? I have no idea - I just know it's cheap. For high end stuff, Dave Tate at Elite will sell you a top quality rack.
Also, the two gyms around Denver have daily membership rates - something like $5 per day. You could do your basic lifting at home, then a few weekends each month you could go to one of these gyms. I called both of these places several months ago because I had wanted to play around with some strongman equipment. I haven't managed to go yet. One of the gyms has bumper plates and platforms for Olympic lifting. Go to the NA Strongman site and use their "find a gym" function and you'll get the location.
Let me know if you plan to come down and I may join you for a workout.