I'm new to sailing and have learned on a McGregor 26 and Lagoon 38. However I am looking to buy an inexpensive boat for a small lake the my kids can use etc. looking at a good price on a Spindrift 17 day sailer. My question is, how many people can comfortable sail on this. It appears to be 2 maybe 3. Can you sail with four adults on one. Want to give and get lessons with the three kids, but they are over 150lbs.