What would I do you say?
It sounds like you want a total of 30 hives, you'd like some honey, but increase in hive numbers is more important of a goal. Here's what I'd do...
Keep all hives strong for honey flow. At the beginning of a main flow in your area, raise queen cells from your best 1 or 2 hives, and use them to make splits from your worst performing hives. Replace the queens in your worst performers at that time also, with one of your home raised queen cells. This way you will get honey for your table or for the Farmer's Market, and you get hive numbers built up again for over winter. You choose the numbers, you can work up to way more than just 30 hives total with what you have now to work with. Pretty exciting huh? Best of luck!