hi
if you realy like building and creating things go on, if not dont start,
youll never finish.
i build an plywood epoxy glued 35' sloop, it took me 5 years of free time
but it could be done it in one year full time.
the boat is now sailing for 20 years.
some tips:
get the most modern plans posible
use modern techniques and tools
use good materials

and even better and cheaper BUY AN USED BOAT

adi