I was fortunate enough to learn at a school that could cover all the desirable add-ons. In a concentrated 3-month course, I did all the ground school, aircraft knowledge, and 105 hours of flying training to get: basic qualification, endorsements for low level , night VFR, sling , hoist , turbine, formation, and Instrument Rating. Very hard work, but achievable.
They even gave me a job straight out of school, as long as I wore their Blue Suit for a certain number of years.