There is certainly alot to think about when designing a plane. I followed the idea mentioned by bla bla. By observing what works, you can be somewhat confident that the plane will behave well in it's first prototype version. It may not be perfect, but it will be a starting point.
As for me, I derive a great deal of satisfaction from drawing, cutting, building MY own airplane. However, there are many really great, inexpensive pattern kits and arfs out there.
My own designed prototype is nearly ready to fly and to this point I have enjoyed the learning process during all of the work to get to this point.
www.geocities.com/markhunt_2000/INSIGHT
Big Ned, I'll see you at the Houston meet on Sat. and I will have my INSIGHT with me...almost ready to fly...cant wait...