This project can be completed in one weekend.
This hammock can be set up using 2, 3, or 4 tension lines. Using 2 tension lines (between 2 trees) will generally require at least 2 tie downs for stability while 3 or more tension lines will not. Attaching one end to a tree that is wider than the hammock width will also create a stable configuration (it's almost like tying at 3 points.). By using the rope access points on the sides, the hammock could be attached to a frame and used as a cot.