Going to get some interesting data, at the very least.
Overhead, with just 2 planes:
Staff salaries: 88 staff, 289k/month.
Fleet commonality, planes: 61k/month.
Fleet commonality, engines: 117k/month
That's 478k/month, even without marketing, line maintenance, heavy maintenance, leasing costs. I have 18 seats. I need to make roughly $900/day/seat, just to break even.
I have the default ticket price on all routes, all under 250 NM, and the average price is $192. If I can fill every route, every day, 6 legs/day, that's $1152. So, $250/day/seat to cover fuel, ground handling, etc. $4500/day overall. My half-full planes currently use $5500/day in fuel, $4600 in pax/nav/landing fees, and $11600 in ground handling. They'd all be higher if the planes were full, but I'm currently looking at 18k/day losses.
My leases are ~35k/month each. 2.3k/day overall.
Maintenance (39 x a, 11 x b, 1 x c, x2 planes) is 3.3k/day overall. So now it's 23.6k/day losses.
So, absolute best case for 2 planes with default pricing: 21k/day of revenue. 23.6k/day loss. Even ignoring marketing, I'd need to fill every seat, every day, at more than DOUBLE the default price, just to break even.
If that overhead per seat doesn't drop significantly as I get more planes, it's going to be a short experiment...