We sailed from
Cancun to
New Zealand via about 12 countries and spent 4 months in the
Yucatan over two seasons.
Cancun is not a good place to
refit and prepare a boat for an 8,000nm
blue water trip. We sailed back to the US to
refit because of the ease of getting
parts in the US. You could probably refit on the Rio Dulce.
The local officials can be difficult at times, my wife is Hispanic and she used to be a freight forwarder and she ran afoul of
customs when bringing in
parts.
It is also
Caribbean Hurricane season and you might not get
insurance until November and then you run into the Pacific storm season, we could not enter
French Polynesia until April.
You would be looking at hiring a
skipper for up to 3 months to complete the trip...Lots of good
boats for sale between
Panama and
New Zealand.