Based on the limited info we have, a SS in a sling that a 16yo kid can afford, the SS is a early 90s or earlier with a 115-150 HP 2stroke.
You may be able to afford the "note" but you'll never be able to afford the note, insurance, plus the bills to fuel, oil and maintain this rig. Don't believe me? My rig sips fuel and its at least a 40 dollar bill for me to fish on a weekend. That 40 includes fuel (truck and skiff), beer, food stuffs and a wash.
second (A)-How are you going to afford to chase pu$$y when all your money is tied up in fuel, honey buns and tackle? I've never gotten laid because I own a boat

and its more than likely you wont either.
Sub Question- Am I dating the wrong women?
third- boats in slings almost always have a rusted out trailer. If they are not completely rusted out it probably will be by the time your relative asks you to get your boat out of his sling. Can you afford a used trailer that will support a shallow sport and let you trailer it down the highway safely?