I would recommend that you build a wood proto first ,put the development in that one ,and shake down the issues on the proto
Then if it flys well , you can make another or decomission that one ,and make molds from it,I saw Mike Harrison do this before.
I don`t want to get into making molds in this thread,way to complicated , and there are way too many ways you can do it.
You can search the composite forum and get that info,
Is it Fun to have your own design,,yes is it a lot of work ,More than you know,, is it worth it ,,Well it all depends on the outcome.
It`s at least a 6 month process working till 2am every morning ,,,working day and night and weekends,, neglecting house,and wife,
spending about 2-3 times the money that what it would take to buy one, and if it flys bad ,,,the only thing you have is experiance.
If your willing to throw lots of money away ,,for a lesson that might or might not pan out in the end ,By all means don`t let no one stop you.
and follow your passion ,don`t be afraid to scew up!
and most of all ,don`t listen to the nay sayers, and get it done.
We need more modelers in the world trying out there skills ,and creating new Airplanes from a dream.
Everybody had to start somewhere your going to mess up, But let it motivate you and it will allow you to get creative and overcome your screw up`s
The guys who hide and overcome there screw ups always get done faster than the guys looking for perfection.