Napoleon´s I. Mexican adventure

So let´s say he is somehow convinced to get involved in the troubled Spanish colonies . He ships thousands of troops (including polish legion, mercenary Mamelukes) to future Mexico to implement a French friendly Monarchy under the code civil. He has plans for Texas, too.
 
How would he even get them there? Yellow fever aside, one of the reasons leclerc's haiti expedition failed was it was hard to resupply them with the RN controlling the Atlantic.
 
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