Project manager for vacation house

I need someone with project management knowledge.
The project is: You and some friends recently spent a week vacationing at one of the local lakeside attraction. After a week of swimming, fishing, water skiing, and golfing in this picturesque setting, you and your friends have decided to build a vacation house on the shore of the lake.

The purpose of the vacation home is not only to serve yourselves, but also as a business venture to be rented out as an exclusive lakeside holiday cottage for other vacationers as well. This is to be a joint project, but because you have knowledge of project management, your friends have asked you to lead the effort, to ensure that all goes well.