I think it s no problém to use the standard arma3 launcher. Just would consider other folder just bc there would not be any space on my SSD with arma.
I used all the mods in the list yet before and even do not needed to download anything to arma, just will use the Save Preset As (or click on mods) and launch the game from it arma launcher. It should normally work.
American or European time matters not to me when it’s in the weekend. If that is what is needed for a one-life game with an actually thinking enemy, then it’s all worth it… for me.