Over the last 8 years, our TC255 on a CAT truck scale with 10-20% gas and no water in 'heavy cruise mode' has weighed 8,500 -9,000 lbs on a 2,000lb trailer.
Since you don't want to limit your options, I would choose Bob's very wise choice of a 15K boat lift and be happy with the extra capacity!
Bob is right again!
Best,
John