First, I would like to appologize to the OP. I did not intend to degrade him. I stand behind the rest of my comment but I certainly could have said it without comment on cost. I am truly sorry.
Second, your subject says you think you failed on your first attempt at building. I don't think you failed. I don't think you built your aiprlane wrong, I think you built the wrong airplane. If my memory serves me correctly that plane has about a 19 inch wingspan. That would give a wing loading of under 2 oz per sqft. And that is a tenth of the wing loading of a typical trainer. Plus their web sites says you will use .5oz of glue so that means you have 1 ounce left for wood, covering, electronics, motor and battery. You would have no structural strenght at all in the fuse or wings. Very minor build errors like slightly warped wing and aft CG would translate into huge problems in flying.
Again I am sorry - I too look at low cost items and am even considering one balsaARF Cub from Hobby King that is only around $30 but itweighs 30oz with around a 46 inch wingspan. Even so I am very concerned about the low wing loading.