As an aside - Lee used to make the equivalent of their Lee Loader single hand loaders for shotshell too. They no longer make them, but you can sometimes find them on eBlag, though they go for high prices. There is currently a .410 one there now 223627531543 - but starting bid is £120. The .410 ones are fairly rare compared to the 12 (I have one of these). You can see it in action here:

https://www.youtube.com/watch?v=9tDPrnM-Adw

There is another single shotshell reloader from Russia which is fairly priced - US$35 delivered: https://ft-camp.com/press_reloader

There are several videos on youtube showing how it works - and it seems fine. They too don't do a .410 though - only 12ga and 16ga.

For .410 your best bet is probably the MEC 600 Jr - but you would have to load a hell of a lot of shells to cover your costs and make it cost effective.