You have REALLY got to want to build - rather than build to save cost. It is a BIG commitment. Here is my RV7 QUICKBUILD diary.....note quick!!
http://www.go-7.co.uk/build/index2006.htm (for 2006).
Started my RV7 Nov'04 finished Aug'06, worked almost every evening and most weekends.
I loved every minute of it and now have another project, but it's not everybodys idea of fun.
Tim