As far as engine controls....I have twin Honda 90s. My boat came with a rear steering station (steering only). I single hand the boat 90% of the time and also will be using it for USCG Auxiliary patrols so I wanted to add throttle controls to the cockpit steering station.
I initially looked at electronic throttle / engine controls (Teleflex KE4+). The price is very unattractive....something around $8k to get the entire setup. But almost as disconcerting as the price, was the amount of real estate they take up. The control heads each need a control unit (8" square by 2" thick). Each engine needs an actuator unit (12" square by 4" thick). Plus a plethora of wiring harnesses...
For a single station, dual engine....you'd need the exact same setup as I mention above, minus one control head. Each engine still needs an actuator and each actuator still needs a control unit.
Long story short, I went with Kobelt mechanical pull-pull controls.