K2 wrote:
Not enough time.
That's what I think too.
Not to be a downer on your parade, OP, but I think you would best served by not visiting any altitude training center. Any benefits gained from altitude during that time would be lost by the time you race.
Since you're taking time off work, and whatnot, I believe your best bet is to use that time (& cash) to train well where you are. Invest time in quality workouts: running, weights, plyos, and other relevant stuff. Get your mileage high, without breaking yourself. Spend some time getting massages. And don't forget to include a proportionate amount of rest to your training.