We have one tech that does house calls in our area. Just to get him to show up is $100 but that will get you quite a bit of work. There have beeen times when he has fixed everything in an hour. But that $100 I could get 2 hours or so. Then he will increase the amount for time spent after that. If he spends all afternoon at your house expect to pay for it.
Recently I have used him on EMs pretty much exclusively but now I am getting better on EMs because he has taught me a lot.
I would not recommend you volunteer to do house calls for strangers unless you are very skilled on ALL ERAS of games! If you fumble around a lot and waste both your and their time it won’t end well. Friends are another story.
Eric