As you are one of those developers I download the missions without any fears that they won't work, I'd say go for it. You are for long time in the "mission business" to know the pros and cons when it comes to aircraft selection and user expectations.
The only thing I would consider as well is the fact that maybe the work is not worth the effort. I mean you (and I know you will) will sit on complicated missions for a lot of time, you try to debug as good as possible and still people will find complaints due to the fact that they screwed up their systems and giving you the blame instead of thinking what they did wrong with the re- and re- and again reinstalling FSX and customizing. They will demand support you sometimes cannot provide due to their ignorance.
I do not know if this is worth the headache.
Next: You spend a lot of time programming and when it goes gold you will soon find out that within days your pack will appear on torrents. So no more money, and also those who use these means will even ask for support...
My 2 cents...
I know you are a hell of a mission developer, just want to give you the warning that your hobby might turn out to be a hazzle.
Forgive me being the negative guy, normally not my part. I also considered doing this for money, but even when my missions were bugfree you should read the emails I got from certain individuals...
Some even complained about the location and became political...
It's a frickin' simulation game...
As freeware you can at least say: "So don't install it if you don't like it."
You don't have to worry about refund...
Kindest regards,
