Getting Permanent Residency Status First Step

Why do you want a permanent residency card? You do not need one to own a Mexican vehicle, to own or sell property. Why do you want one? It is costly and it is a hassle at the airport leaving the country. The only benefit I have heard/read is that you might receive a 25% discount on your capital gain taxes when you sell property. I am eligible for a permanent card, but am seriously debating whether to get one

Getting a permanent residency is a one-time expense. It allows you to get a refund of the tourist tax airlines add to the cost of the ticket. I don't knows about the discount on capital gains taxes.