Welcome to ETS.
You look like you have the tools segment taken care of but as others have noted; buy quality. You don't have to spend hundreds of dollars but don't shortchange yourself either. A good fixed blade like a RAT-5 can be had for around $75 give or take. I just got a RAT-7 for $55 recently.
Many headlamps from Petzl and Black Diamond cost less than $50.
There are a lot of moderately priced LEDs out there these days.

But what I noticed most was a lack of food ( oatmeal and granola bars; more oatmeal) and cooking gear. I would suggest adding some more food. You could add freeze dried backpacking meals, MREs, or even canned goods. But for 72 hours you will want more
than oatmeal. Also some drinks would be nice; tea, coffee, soups
and even electrolye drinks could be a benefit.
Get a small alcohol or tablet stove and an actual cookpot. The coffee can is a good way to improvise but you are planning now so get the right stuff.

I wouls also add a wool blanket or two. They are warm durable, fire resistant and have some insulation value when wet.

Good luck, I hope you never need your BOB.