old vs need replacing- a way to price out a used trawler
Looking at trawlers 38-47 ft, used. Moving up from 45 yrs of boat ownership from 14-29 ft, outboard and sail. Sporadic trips on 40-70 ft motor and sail, but never primarily responsible for their operation and maintenance.
Have not previously owned a boat (other than a Boston Whaler hull) that was > 10 years old. Particularly when it came to offshore fishing boats, I could be accused of having redundant systems and replacing systems prematurely to avoid failure when far from home/shore.
When looking at single diesel boats 10-25 years old, when do you roughy assume that systems will be replaced (assuming good maintenance, but all systems eventually fail or are out-dated functionally)?
Trawlers in this age range have bow thrusters, windlasses, AC/Heat systems, autopilots, refrigerators/freezers, many pumps, many hoses, hydraulics, tanks.
Assuming good maintenance, is there estimable life cycles for the many systems beyond the hull-decking-engines?
Trying to estimate the purchase "value" of used boats, knowing that there will be costs to making her reliable for offshore (short) passages.
I plan to keep her near coastal the first 1-2 years while I learn to handle her and
trouble shoot the many systems.