siesta, nobody has really addressed your question. after posting last night i pondered your issue. at the risk of being labeled anti mexico or anti mexican (i am neither) here is a deeper response.
just my 2[FONT=Times New Roman, serif]¢. [/FONT]remember as always ymmv and free advice is worth every penny.
1) the mexican federales have a long and storied reputation for corruption. a history of, what, over 50 years. i dont know of any sifnificant reforms.
2) layer on top of that the drug cartels and narco terrorists, who seem to have no problem decpaitating 15 or more folks and rolling their heads into a local bar.
and you propose to waltz in with 10 thousand cash. seriously. if worst comes to worst i hope you only lose money not your life.
if you really want a peso denominated bank account, use a wire transfer. and it is probably cheaper if you can find a bank that has a relationship with a us bank. you wire to the mexican bank in care of the us bank, where the mexican bank maintains a sweep account. then it is simply a us fedwire. probably cost you in the $40 range per transfer. if you must wire directly to mexico a true foreign wire is probably more like $60-80. depending on what fees your bank charges. i used to have to wire money to canada, and it was far simpler with someone like royal bank of canada (rbc) - we wired to some us bank (i forget) where rbc had an account. they converted to $can and swept it on their side of the border and paid the vendor in $can.
i know your premise was to capitalize on a stronger peso. remember, if you are moving south to save money you are already getting most of the bang for your buck. don't try to squeeze every nickel out. you would probably do as well to just use a us account and withdraw from a local atm in pesos. you generally can get the equivalent of $500us per day. fair to good exchange rate. i pay $1.50 per draw when we visit daughter in germany. and i am sure you can avoid that with an account at ally or similar. buy stuff with a credit card, then pay your cc bill online, and boom, done and ready for another margarita. even at a buck and a half per draw, you will probably spend aobut the same as wires. so the only issue is the potential gain on a stronger peso. but that can work both ways as currency does fluctuate. and if you decide to bag it and return home you do not have to untangle a forein account and pay more wire fees and currency conversion costs to get your own money back home.
just one person's opinion. no more no less.