We have one who comes with two helpers. We pay $25 for each of them for an hour (so kinda like three hours equivalent, all at once - which is great because we don't have to stay out of their way for as long!), $75 in total. I get them once a week. They do everything they can fit into the hour (cleaning only though).

We got ours through a company but pay them directly, so no ongoing mgt fee. The company seemed more like a placement service. The first ones they sent around were dreadful and didn't follow my instructions at all. So we asked to change and got the ones we have now, who are great.