When/if they swarm, they always leave behind a fertile queen and about a third of the hives bees. If its established it will take intervention of some kind to get them to leave.
To get them to move into a hive box enmass can be done but involves tricking Mother Nature (rarely successful and entails risk.)
Yep. Your a bee keeper.
You can get some swarm lure honeybee attractant
“Yep. Your a bee keeper.”
“guess what buddy... We are moving in like it or not. You are a beekeeper now.”
I got Bossy Bees. lol
Yeah, I think my best bet is getting a box parked next to it and trying to get them to move to it. Then a real bee keeper can come get them easier.