I have a 2001 1800 with 3.0 inboard. I've had the boat for 5 years and am very happy with the performance and reliability. My max loading is 750 lbs, and yours is probably similar. My max speed is 41 mph with 19P prop, 2 people and full tank of gas. You can most definitely pull a wakeboarder. I use a 17P prop for skiing and wakeboarding if I'm taking 4-5 people out, which I usually do.
Take the boat out for a test drive and run it at 4400 rpm for a few minutes and see how she feels. Make sure gauges like RPM, Oil pressure, fuel, temp, and trim all work. Don't worry about it if your speed indicator is acting funny, it's almost always a clogged port. Check that the stern drive trims normally. Also check that the seats are secure to the deck, and that the deck doesn't have soft spots. I don't think a survey is necessary for this size/price of boat, but others may disagree. Good luck.