My .02:
-Exhaust: You should have a buddy for this but even totally dogging it, bs'ing and drinking beer I'd estimate 30 minutes to remove and 30 minutes to install plus some time to unpack and inspect new pipes. You'll need new exhaust gaskets as well.
-Auto tuner: Plug & Play. Tough part is getting the one connector on. Remove 2 bolts and prop up tank. Others have posted long needle nosed pliers make the job easier. 1 hour is generous but protect the painted surfaces and take your time.
-Hypercharger: This will generally take you as much time to unpack as install. 30 minutes easy. On my alley cat I had to reuse the stock o-rings but getting those out was a toothpick deal.
-Custom Headlight: Depends on the model. I think here an hour is fair.
Miko's friend's 4 hour quote is a fair deal but if you could save even 1/2 of that you're reducing the cost of the mods and that might even make the misses greenlight another mod...
As others have said if you lived closer I'd be more than willing to help for pizza and beer. Always looking for another riding buddy