I don't own property in Coz, but I do on the other coast, perhaps the rules on the island are different, but my experience was: to buy "property" ie condo house etc, within 50km of the coast, title has to be held in a fideicomiso (bank trust) which, when I bought in 2005, was 10% of the purchase price and is renewed annually at 10% of the original trust fee. It was easy to do as the banks, lawyers and realtors do it all the time. Do some research on the net....there is a ton of info out there, and do some research into the capital gains tax you will have to pay the mex gov't when you sell. If you want to avoid the trust, Canadians can own a Mex Corp...so could form a mexican corporation of which you own 100% and then the corporation can own the property outright. Wasn't worth the hassle since the trust was so easy
As Christi said an FM3 is something you might want and is easy to get since you're in Toronto and there's a Mex consulate there. The FM3 allows you to stay in Mex all year and to bring personal possessions for your house...furniture or whatever.