Most times, R/C clubs have plenty of qualified volunteers who will take time to teach new modelers how to fly, and that's fine. We must remember that it's not wrong for someone to charge for lessons, but you must consider the source, and whether the club actually permits it. Once the instructor starts charging, it becomes a "commercial" operation, and the modelers' and club's AMA insurance no longer applies. Very likely, even the liability portion of one's homeowner's insurance may not apply. Some flying fields are on public or publicly-owned property, and "for-hire" operations may not be permitted. You have to check these things out, especially if you're going to be charging someone to teach them.

There ARE people who regularly charge to give R/C flight lessons, and they will provide everything: plane, fuel, master and student transmitters, and so on. You may actually get very good value, here. Also, there are a few commercial operations around the country that are set up as R/C flight schools. While I have zero knowledge about their quality, I have seen ads. They may be something worth checking into.

All that being said, again, it's not wrong for someone to charge to give R/C flight lessons. If the person is a good instructor and you agree to the charges, who's hurt? Most clubs, though, have volunteers who are very willing to teach, and will do a good job, too. Don't put down the one who charges just because they charge.

All this from one who's never charged anyone they've taught to fly.