I am in Cabo right now. It is approximately 2600 nm from Cabo to the Marquesas
. YOU DO NOT WANT TO MAKE PASSAGE
FROM CABO TO THE SOUTH PACIFIC DURING SEPTEMBER! This is the middle of hurricane
season in Mexico
. In fact, there is a hurricane
approximately 300 miles south of me right now. The soonest
it would be safe to leave is November.
You do not want to predict future performance in the open ocean on a coastal passage
from the US to Mexico where you will have both wind
behind you. The results will be optimistic.
I think that your assumed performance for your vessel at 3nmpg is way optimistic, even at 1200 rpm
, but you know your boat better than I. I would not run the motor at 1200 rpm for extended periods of time. Conventional wisdom says that you should run your motor at 60% to 80% of maximum rated RPM for 80% of the time. I'm guessing that the maximum rated RPM of your Cat is around 2500 RPM.
You will want to arrive at your predicted destination
with at least a 15% fuel reserve - for unpredicted weather
, adverse winds, or whatever. That means if you carry 1500 gallons of fuel, you will need to average 2 nmpg for the Cabo/Marquesas leg. Running at 60% of rated RPM in your boat, that is going to be tight. Have you included generator
run time in your predicted fuel consumption?
I run a John Deere single engine setup in my boat. I am not a fan of back up engines. They never perform as well as predicted. I have a downwind genoa
rigged on my boat for both an emergency
"get someplace" system and to increase performance on downwind legs. The key is to keep your single engine well maintained to avoid problems. And keep plenty of on board spares.
Budget: I know people who cruise
on $2K per month in the SP and those that cruise
on $10K per month (for two people). Close friends cruise on $6K per month but that includes $2400 per year for booze and $6000 per year for airline fare back to the US to visit family
and take care of business. Your biggest expenses in the SP are going to be food
and fuel - prices are astronomical. Realize that in many places in the SP there is a substantial daily fee for even anchoring
out. (Cabo is even now discussing the possibility of a daily fee to anchor
out - figure about $2 per foot per day in Cabo for a marina slip!) Anything is possible on any budget, but I personally could not live on $2k per month in the SP.
I don't mean to discourage you but want you to be realistic. You can cruise on $2K per month in Mexico in relative comfort. Many people stop here on a passage south, like it so much, and decide never to leave.
Good fortune and fair seas.