Also as you csn see, planes that are already serviced have a yellow ticker and the only remaining ones are ones that need servicing. This can also be seen on the airport as all serviced planes are green (ready for tkf)
The below picture shows you the aftermath of bulk takeoff, exit to menu, repeat.
nearly all actions will be stopped once you quit the game. the only operation that will run in the background is the timer for handling your connection partners aircraft at all. this happens to avoid getting aircraft stuck at connection partners airports because the partner is not playing
bulk take off is imo only an option for single runway airports. At IAD it’s unnecessary since you have a separated runway for landings and takeoff. the only thing you’ll create with bulk take offs are game crashes at IAD
Im pretty sure its automatic. If you have a connection with a player at the city youre sending a plane to it goes to him by default. It only gets sent to someone else if your connection partner doesnt land it within the 4 hour waiting period.
IMO the difference in income for S planes is neglidgeable except in PRG (and im guessing IAD, havent gotten there yet lol). Also ATR is the smallest plane so, less pax, less profit. I suggest switching to a BAe146 as it carries as many pax as an E190 but for S size. Though the true goal is, as you are luckily pursuing, an A320 fleet and eventually progresion to L and X.
As @DuneCrawler shows in his picture, player A320s in PRG make on average 2k while the regular ones make only like 300 on average. As you can see the difference is drastic. Also the more A320 you have, and thus less airline A320s, the more profit you make.