Hivemind increases your honey yield by helping you get to your sites exactly on time. You currently lose 2.36 fortnights of peak production per year (3 weeks + 6 x 2 days). With 110 hives producing 15 kg/fortnight each, you're producing a total of TOTALKG kg per fortnight.
This is a loss of TOTALKG x 0.00 = 260 kg/year for each yard. Since the price of honey is $3.30/kg, your loss evaluates to 260 x $3.30 = $11,682. That's your annual production loss due to timing alone.
Incidental expenses would be around $2,100 assuming 3 unnecessary visits (8 man-hours per trip x $50/hour + $300 fuel @ $0.67/km).
Our calculation didn't even include swarm or theft prevention (perhaps $300 per lost hive).
Not to mention peace of mind, better route planning and better apiary management.