Whatever you do, donít trap them inside. It will turn into an emergency much like ohímike described. We charge even more for that.
Can you use one of the long-distance aerosols for wasps? If still to far from the ground, can you spray out of a window that may be closer?
If these are yellow jackets, honey bees, than you need to do something as they build big nests and chew thru drywall eventually. Wasps donít chew except to make paper for their nests. It can be hard to ID them at a distance.
The prices that our industry charges will vary greatly from one region to another, even from urban to rural within that same region. If a ladder/bucket truck is needed that would be another factor.