Has anyone ever ordered any these so called "survival kits" online? I was thinking about putting a kit together at home in case SHTF but I'm wondering if its cheaper to order one of these kits or put one together myself?

I have all the guns and ammo I'd need (well need, not want lol, I could always use more)

But I'm talking food, water, first aid, etc. I'm definitely looking at the #10 cans from Mountain House, up to 30 year shelf life but that shit is PRICY!

Just wondering if anyone has any experience with some of these online vendors.