Carsnoceans, I see you’ve received excellent feedback on your questions already, particularly from Gardyloo.
The one thing I’ll add relates to the cost of flight-seeing and boats (fishing or wildlife viewing). They are expensive to maintain them here, and insurance is very high. As someone already mentioned, Denali has its own weather system, which makes flying in the NP an extra challenge -- so you only want experienced pilots to take you in there.
I love the suggestions about seeing some of the interior of Alaska, but know you have to weigh logistics and priorities.
As hotels are so expensive in the summer, what do you think about bringing a tent or buy/rent a used one here? Just make sure you understand how to store food in bear country. I don’t know what the motor home rentals cost, but that might be another option to meet both your transportation and lodging needs.