I suspect it would be cheaper to hire a delivery captain and sail it across. Is it seaworthy enough and equipped correctly to entertain that notion? Port of Corpus Christi to Port of Tampa is 870 nautical, which is 6 days at 6 knots. If a captain is $300 a day, and a crewmember is $125, that's about $2600, though I would add a day for a pre-voyage checkout.
You may want to check with your insurance company to see what your coverages are by both methods of transport.