I'm looking at buying 10mg vials of tirzepatide from Biotech Peptides. Current dose is 5mg. A few questions: 

1) The item I'm buying is just one vial, right? I've seen that some of them come in packs of 10.

2) If the bottle is 10mg, and the current dosage is 5mg, that means it has 2 doses per vial, right? So 1 vial = 2 weeks, and 2 vials would be one month's worth?

3) I currently pay $345 for a one-month supply. Assuming I'm doing the above math right, that would mean one month's worth (2 vials) from Biotech would cost $400, or $200 with their current 50% off sale... so it's substantially cheaper to do it this way, right? 

4) How much of the bacteriostatic water should I add? I really can't figure this out. The current prescription just says "5 MG/0.5ML." I think I saw someone say 1ml is a good amount of water to add? 

5) How long will it keep? I've seen a lot of people stockpiling, but I wonder if it's still good even months down the line? Thinking about buying 2-3 months' worth of 5mg.