I have seen local farms with bee boxes that appeared to be traveling to and from in the back of a truck - I assumed they were put there temporarily, then removed to their "home" wherever that is. :)
Those farmers are typically paying pollination fees to the beekeeper to get the beehives on their property to pollinate their crops. Dozens or hundreds or thousands of acres, and the beekeeper keeps any honey that the bees produce while pollinating (IF there is any honey to keep).
While the bees would love your lavender, 11 plants is not going to be enough to inspire a beekeeper to put their girls through the stress of moving (or the beekeeper through the expense and time required) for a short-term, no-fee move.
That's not to say it's not worth talking to a beekeeper though - but they're going to be interested in what other plants are around you in the wider environment. Did you know the girls fly about 3km from the hive to get to nectar sources quite easily? That's a lot of space, but it's also an indicator of how much it takes to support a hive.