A female monarch lays its eggs (1) on a sprouted milkweed plant. The eggs hatch in four to five days producing tiny yellow, black and white banded larvae (caterpillars). These caterpillars (2) will feed solely on milkweed and eat enormous quantities because they are growing fast.
Roll-up door spring repair or replacement is usually around $200 - $250 for a 2 car door. If the brackets need to be disassembled to remove the springs due to the shaft not sliding sideways enough it will cost you an additional $50 - $100.
1 Exterior door replacement in an existing space costs around $250. To create a new space for sliding glass or French doors it might cost $500 to $1,500. 2  A basic knob and lock set costs $50 to $100; designer exterior door hardware costs more.  Exterior door installation is a manageable DIY project.