sell and trade with other islands (on one island what ever is cheaper on one island is worth more than the next ).
You can get doubloons by sinking other ships, monsters and by selling cargo.
Buy boats with doubloons
keep trading
Earn 500,000 doubloons then get a loan at Golden Harbor at the bank .Or you can as many as Grains as you can then sell it at Pirate Outpost until you get 1,000,000 doubloons.
the cannoneer is 20,000 doubloons.
you have to get doubloons by trading grain silk medicine and spice (go around all of the islands on skullduggery)
You can get more doubloons on skullduggery by finding random pieces of cargo around the sea or by selling your items (Grain, spices, silk and medicine) another way to get money is to get a loan from the loan officer on the golden harbor good luck .
it costs 20,000 doubloons
search this on youtube;GET MILLIONS OF DOUBLOONS IN POPTROPICANA ! REALREALREALThen watch.
You get a larger ship by having a lot of doubloons and then go to dragon cove and buy and new ship. Hint the cheapest ship is 3000 doubloons and the most expensive is more than 30000 doubloons.
All you do there is to hire the Cargo Master, when you can afford him (salary 15,000 doubloons).
It takes approximately 25-100 "days." Everytime you land is counted as a "day" in Skullduggery Island.