Well done...it look very nice.
How much is the total material cost.......it just show what you can achieved when you put your heart and mind to it...congratulation!
I am thinking of building one too and have been looking at what others has designed and built on the WW web.
I came across our fellow AS in Malaysia who has also built one that is out of this world...for an AS that is. See this URL...
http://www.skyteoh.com/aboutus/index.html
Will pay him a visit next year to have a look and chat with the fellow AS, as I am thinking of having a holiday up there.
Again, well done and keep it up!