Damn I'm paying just a little more than that for a 3 bedroom, 160 sqm place.
You're lucky that the owner.management company is allowing you to pay in pesos at the official exchange rate. I get the same deal, but a lot of people's owners are asking for the blue rate if they pay in pesos when making the deal in dollars. It does help significantly with the rent!
For Xoom, I think the limits are just about what you pay for rent.
I believe over $10,000 pesos here you will have to file information with More Money Transfers, who is the contractor for receiving money here from Xoom. As it is, you will have to fill in some personal information the first time you go to collect money.
That's the receiving end. You can do it easily here the first time you receive money.
For sending, to get over Xoom's sending limit, I understand it's a bit complicated. You had best work on that while in the States before you come down here, I think. There is information on their site who you should contact and they'll give the you the paper work you need to increase your limit.
I've never bothered to do that as the cueva I use is has no limit (until we're talking about $100K USD, and that's not me!).
Bring as many dollars as you can for monthly expenses aside from rent, unless you easily get Xoom's increase to a sufficient sum to cover all your monthly costs (not necessarily 100% certain, and then on the More side here, you might have problems getting registered for more than $10K pesos).
You really never want to use your US ATM or credit card here due to the exchange rate.