the holes that have to be cut are on the inside for the heat tubes that are pulled out. nothing structural but some will not feel comfortable cutting into the 'glas on the inside of the boat. it's not hard as long as you are careful but sure most will opt to have dealer install. guessing 3 or 4 bills to install as it's a couple hours of time.
wiring should all be there and if I were skiers, run the antifreeze lines with a u-shaped bypass so the heavy work is done already. then it's simply drop the box in, hook up the water lines and power and cut a few holes for the heat tubes.
should be an option similar to prewire the tower.