Lets run some numbers shall we?
VEE costs 5 essence a pop. We are currently Essence 3 which is 15 motes. Essence 5 is 20 motes.
Our best method of essence recovery is resting in a dragon nest/charred sinner renewal, which restores 1 point of essence every 15 minutes.
Assuming we are willing to run ourselves dry before recovering(we shouldn't) and do this continuously(we don't have the time), and don't sleep due to supercoffee, and the time taken granting each wish is negligible and as many people are there as we can grant the wishes of without us having to arrange things...
At Essence 3 we can grant 3 wishes per hour with a recovery time of 3 hours and 45 minutes(3.75 hours). If we take the time to recover the spent essence after each wish that's an hour and 15 minutes per wish(1.25 hours).
24 hours/3.75 hours for recovery = 6.4, meaning you can fit 6.4 recovery sessions into a 24 hour period.
Lets assume we start with 15 motes at the beginning of this venture/essence 3:
Day 1: 3 wishes as freebies -> 20.25 hours left, 6 total wishes -> 16.5 hours left, 9 total wishes -> 12.75 hours left, 12 total wishes -> 9 hours left, 15 total wishes -> 5.25 hours left, 18 total wishes -> 1.5 hours left, 21 total wishes -> .25 hours left, 22 total wishes
Day 2: 20.5 hours left due to taking 3.75 hours at the end of day 1 to regain essence, 25 total wishes -> 16.75 hours left, 28 total wishes -> 13 hours left, 31 total wishes -> 9.25 hours left, 34 total wishes -> 5.5 hours left, 37 total wishes -> 1.75 hours left, 40 total wishes -> .5 hours left, 41 total wishes
so lets assume 19 wishes a day + 3 for the freebies on day 1
Assuming Molly acts in the way described for an entire year
19*365+3 = 6938 wishes
Lets now assume we start with 20 motes at the beginning of this venture/essence 5/5 hour recovery period
Day 1: 4 wishes as freebies -> 19 hours left, 8 total wishes -> 14 hours left, 12 total wishes -> 9 hours left, 16 total wishes -> 4 hours left, 20 total wishes -> .2 hours left, 23 total wishes
Day 2: 19.2 hours left due to recovery time at end of day 1 carrying over, 27 total wishes -> 14.2 hours left, 31 total wishes -> 9.2 hours left, 35 total wishes -> 4.2 hours left, 39 total wishes -> .36 hours left, 42 total wishes
Essence 5 doesn't make much of a difference we're still basically restricted to 19 wishes a day if we put everything we are to the effort.
So assuming we devote everything we are to granting wishes under optimal conditions:
19 wishes a day
133 wishes a week
589 wishes in a 31 day month
6938 wishes in a 365 day year
Add 3 to 4 wishes to these numbers depending on essence rating if you feel the need to give freebies at the beginning of the wish granting spree