I suspect that you're retailing the sourwood honey. ($7.50/lb and 100lb/hive?)
To make that kind of gross doing pollinating, you would need to chase the bloom. Do almond pollination in Feb, then start in the southern US, pollinating orchards for a week or two, and then moving north to another orchard, eventually ending up in Maine for the blueberries.
If you worked your butt off, you might be able to gross $750 a hive, but your net would be considerably less.
You could either develop your own contacts in each location, or you could hire a broker to find pollination contracts for you. Different crops require a different hive set (# of hives per acre).
It would be much easier (and more profitable) to run another 20 hives in sourwood and keep growing that market.