all the above is true. even if you did buy a company that held one, you would enter a qualfication process, let's just call it recertification if there weren't any ops in the prior 90 days.
this process alone would seem like the total certification done all over again.
if you have 20 million, you can buy Pace, a 121, a 145 repair station with continental as their biggest customer, DOD approved, Etops for 75,76 and has 73s running around.
you would simply have to pick out the paint color of the office if you bought the company, and then we'd get a new op spec with President name changed. This assumes that you wanted to be president.
I just used Pace as an example because we've been for sale ever since Brooks died, one of 5 original Hooters founders.
You ask the cost, here is the answer. $0.00.
You march yourself down to the local FSDO. Apply for a single pilot certificate. Do paperwork yourself. Wait about 3 months. Get certificate. Fly for a 1/2 year and see if it might be viable. Then, apply for a basic certificate. Do paperwork yourself. Grow a bit there, then get full certificate.
That's what I did. Ended up with multiple aircraft, from 310's to King Airs. Total cost $0
Had both US and Canadian Certificates.
Took a bunch of years, but you have time,,right???
i did my own . it was in the 90's. took about a year. your friend the consultant is a good thing, but be weary of guys trying to make thier house payment by charging 5-10 grand for a 50 page term paper you can do yourself if you sit down and read each reg.
you don't have to be a lawyer, but understand FAA speak. be sure to include "all the subparts of this paragraphs, yada, yada."
You won't get a 10 or more Part 135 Certificate for at least 2 years if ever. They don't want to give any out.
Some of the best have tried, but can't get them.
The FAA thinks there are way too many certificates out there and they don't want anymore as they have to dedicated resources to monitor them.