@Rocky_H, and everyone else: Thank you again! Honestly, it is so nice, and as of late somewhat refreshing, to be able get helpful info and advice online.
As I said, I'm still hiring an electrician to do this, even though a family member has his own construction business, and my hands aren't backwards either, but I know my limitations; that said, I'm the kind of person who loves to learn and understand, and also
needs to learn and understand, plus the more I've read about this the more interested and fascinated I've become by it.
So, first you just saved me some money, because now I understand that I do not need to run 100 plus feet of 6awg neutral wire. The only thing that will be installed on this line in the garage is either a 6-50 or 14-50 outlet OR a WC or possibly in the future a sub-panel with two circuits for two WCs.
As a side note, I now finally understand all those diagrams about how an electrical circuit works, and I now understand that in a 120x2=240v circuit (maybe the following terminology is wrong) but the second 120v line takes the place of the neutral in that it's returning or completing the circuit. (Now that I've said it, I'm sure my terminology is wrong, but I think the general principle is correct).
I believe I understood everything from the answers above except for the bolded part here: "No, you do not need to run a neutral. Even with Gen2, it would have required at least a junction box to do the Y-splitting of the wires with connectors,
so there would have been something there anyway. In the Gen3, that box just needs to be more specifically a subpanel, because the Y-splitting has to be done with breakers." What "something" are you referring to? This is purely an educational question as I now understand the practical effects of what I need or wish to have installed, which is basically a 6/2 wire running to a 6-50 or a WC.