Re: Will this work
Most people will say that you should have a 4.3L or larger for effective wakeboarding. But you shouldn't have any problem using yours as long as you don't have the boat weighed down too much with people and gear. The more weight you're having to push through the water, the more you'll struggle.
The length of rope depends on you're experience and what you want to do. As a beginner, you'll benefit from a bit shorter rope (around 50 ft.) as this will place you at a point where the wake is narrower. This helps when you are ready to jump wake to wake since you don't have to clear as much. As you progress, you can lengthen it 10-15 feet to get back to a wider wake area.