I love rivet nuts and have figured out several ways to fasten them, all slow and sometimes problematic.

Sure wish there was an electric (or battery) gun solution that was reasonable.

The ones I've seen are like $750 to $1000, i.e., somewhat out of the range of something you want to have, but don't use all that often.

The tool I use was only $40 and works great. Don't see any reason to pay more for something like that unless you were using it more than a few times a week.