Good for you, I’m just starting down the road a of a similar project.
One word of warning, CB450’s aint that cheap anymore – You may find a CB250,350 or 500, but it seems the 450’s are asking plenty for even something thats been dragged from the bottom of a pond. This is because people are spending a fortune to turn them into Drixton’s – Fantastic but spendy – Twin OHC motor thats a little harder to come by. Not ideal if your skint, unless you know of a stock of them for cheap cheap then ill take 2…..
That and now ive started my own cafe project (about 3 months ago) i can tell you everything costs about 3 times as much as you budget for….
Good luck – let me know how your getting on.