Bronx,
Floyd Bennet field, what history.
I'd suggest making a short list then talking and visiting operators of the type to determine true operating costs.
Then work out a short term lease of a few different types to see how they actually work in your operations.
And keep the L model with the C-30 as a backup, great power and cheap to run.
222, 230 and 430 would be nice but pin down Bell on spares cost and availabilty before buying.
Let us know what you got !