I just re-striped my entire boat - took about an hour. But I have done this multiple times before. If it's something you're 'on the fence' about doing it yourself, or are not sure of your comfort level for this, I would suggest skipping it and hiring someone. The last thing you want to do is waste the roll of tape you just bought and then have to pay someone to do it... along with buying another roll. There's a few tricks and tips that can help, but I'll save my typing until there's a response. This, of course, is assuming you're doing the whole thing - splicing in a small piece is, as expected, less work.