I have had a Bruce 22# with 35'' of chain and 200'' of
rode on my Pearson 10M that fully loaded went about 13,000 lbs. The 22 saved my bacon for many years but I upgraded to a 33# because my "buddies" told me it was too light. All depends on how you plan to launch and retrieve it - I still do it by hand.
Good luck with the new boat!