I reckon you should just buy one and get it out on the road. That's where the real fun is
Bugger building one for a joke. Unless you can get it done in 6 & 1/2 weeks you're in for a long haul (but I wish you all the best if you choose to go this way.)
I bought my RMC from Perth and spent some of the winter months tinkering & modifying small things (re-covered dash and changed the layout, put on visors & windwings etc.) and just have heaps of fun driving it whenever I want (or the weather allows)
My 2 cents worth.
Cheers
Batman