I want to take out my attic floor and my bedroom ceiling an open it up to a cathderal ceiling,can I do it myself?

Thought this might be helpful to others - and if something obvious is missing - let me know! I have a 30x30 poured concrete basement to finish. Stage 1 of my project is wall construction. Here's the list of needed items and their cost: 1. 100 Steel studs 2x4x8 @ 1.27 each 2. 25 Steel tracks 2x4x10 @ 2.00 each 3. 5 - 1lb. Pan head screws 7/16" @ 4.50 each 4. Screw gun with clutch @ 75.00 5. 12 2x4x10 treated wood studs for soles @ 3.50 each 6. 2 boxes 6mm Poly vapor barrier 10x100 @ 25.00 each 7. Staple gun for Poly @ 30.00 8. Nail gun for wood/steel sole @ 70.00 9. 3 Pony clamps for holding steel in place @ 3.00 each 10. Tin Snips @ 15.00 I already have the saw for the wood, concrete nails and leather gloves. Also have the chalk and plumb line, and staples for the gun. I am skipping the crimper (60.00) and don't plan to hang heavy cabintes that would require extra wood. Total: approx. 500 bucks (only 300 if you have the tools)