I don't know about shipping a boat over the ground. I DO know about shipping a boat by cargo ship. Last time I shipped a boat by sea, in 1994, it was from Belize to Tampa, shipped on it's trailer on the deck of the ship. I used Tropical Shipping through their West Palm Beach offices to ship a 23' Seacraft. Total cost was just under $1400, not counting import tariff of $335 and doc stamps out of Belize and into the US of about $80. The downside was that in order to get that price, I had to wait nearly 4 weeks for open deck space. To ship by sea is usually less than by land, but I'm sure it's more than $1500 now.
Figure a driving/towing cost at 16 mpg over, 12 mpg back - of about 330 gallons gas, plus minimum 6 days RT, plus food and lodging.
A conservative estimate would be about $2,000 to $$2,500, not including the value of your time. Plus you get to see this great country of ours.
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Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes.
Fr. Frank says:
Jesus liked fishing, too. He even walked on water to get to the boat!
Currently without a SeaCraft 
(2) Pompano 12' fishing kayaks
'73 Cobia 18' prototype "Casting Skiff", 70hp Mercury