Build a cradle to support the hull.
Leave the cap on.
only replace one stringer at a time (do not rip out all the stringers at once - you can cause a permanent hook in the hull)
make cardboard templates of everything before you tear it apart (floor, stringers, etc.)
Budget for the materials and time and then multiply by 5.
Buy in Bulk (composites one)
Refrain from buying boat jewelry and electronics until all the fiberglass work is done. (you can blow your whole budget this way).