I believe you're on the right path here. You have good ideas (fleet commonality is a key factor in reducing costs).
Now, there's a couple of things to make clear for you :
-Try to avoid have landings/take-offs between midnight and 5AM. Usually, this is a dead spot. I have most of my planes taking off between 5 and 5.15, and they have arounf 90% LF. This is just the dead period.
Later in the game, you'll get that your planes can be in the air during this period, it will not be an issue. (e.g, for a 6h flight, you can take-off at 2355 and land at 0555.)
- decreasing and decreasing your prices are not good either. The ideal way to start is to take a route w/ no competition if you can, and have prices 20% lower than suggested. When your route image exceeds 60, raise the prices a bit.
- Flying a route means having fixed costs, such as marketing campaign. If you fly the same route twice, your fixed cost will benefit two routes instead of one, and then you'll get more money out of it.
- Finally, don't overwhelm a route with offer. if the estimated pax on the route is 100, do not exceed 150 seats offered, as it would not be worth it.
I basically suggest short routes to start (such as <660 nm), so that you can fly several times a day.
Hope this helps