Welcome Mick, you are among friends,
I assume your Mortgage is paid off and your lottery winnings have been wisely invested and it will help if you are on first name terms with your Bank Manager.
One of your first priority's should be to soundproof your workshop (Its all the language you will be using) then you are obliged to waste your time looking through webpages and magazines searching for -- well you will know what it is when you see it.


Good luck,
The closest comparison I can think of is "Sinking into a quagmire" ,
There is a site on the www that displays Technical drawings with complete measurements that can be of great help in your build.
www.drawingdatabase.com
Shaun.