They do but the cash outlay can sometimes be spread so It doesn't hurt so bad. I've never bought a new boat, can't afford it, but I can prioritize the shortcomings of the old boat and hopefully keep it going awhile.
If it's anything like my old 27 there's very little space between the hull and inner liner. The only reason to cut it would be to back up a motor mount. IMHO
This hose is probably connected to the drain on the oil pan for draining the oil thru the garboard drain hole. the hose may have a leak in it. it's not oem so wouldn't show up in a manual.