Bulkheads usually come in kits. Lay out the pieces first and follow the directions step by step, and it should only take you four hours or so build. Before you secure all the bolts, make sure the doors close and latch properly. Then seal the base with mortar. Slope the edges to keep your bulkhead watertight and your basement dry.
If you replaced all the windows in your home with Energy Star qualified windows, you could cut your heating and cooling energy use by an average of 15%.