This is what I am thinking breakdown wise given the available pricing data I was able to find notated below.
Avg cost of CBD per mg: .30
Avg mg daily dosage (varies slightly per body weight): 15mg-33mg (25mg avg/base for calculations)
Avg daily consumption cost: $0.30 x 25(mg) = $7.5
Based on these rough estimates I can assume the cost per "bottle" will be $7.50+.
Now the question is: How much foot traffic is to be expected in front of these first 15 machines.
Simple Projection: 15 machines. Doing 25 sales a day (which I think is low compared to expected traffic). At $7.50 (worst case) per "bottle" = $2812.50/day * 365 days (because machines never close) = 1.02M+ a year off of only 15 machines...