help with choosing the right radio

[weemanch]

okay i have been out of the r/c game for awhile now, but going to get back in it this year with semis. which i am also interested in a excavator as well(thinking at current market the liebherr 944b(from premacon, like the idea of quick attachment stuff) but also looking at running either a dump truck or dump trailer or both.so basically trying to keep controller count down to a minimum, or at least one controller for the 2 trucks i want.

so ill type cliff notes of functions i am wanting/knowing i'm gonna need add more that i maybe forgetting
truck
channel 1:throttle/brake
channel 2(3 position):transmission
channel 3:steering
channel 4:?want lights and sound but pretty sure that stuffs just tied in with the receiver connections to the various things but assuming the lights take a channel to turn on and off?
channel 5: something for the dump bed/trailer
am i missing anything for a truck what about the excavator?(i am sure i'll need more for that.

excavator
channel 1: left track
channel 2: right track
channel 3: bucket
channel 4: cabin rotation
channel 5: boom in/out
channel 6: boom down/up
channel 7: lights(possibly even on/off toggle switch mounted on machine)
channel 8?: ditch bucket left and right
amything else?does the quick coupler require anything?