... but I would be doing all those things myself:
engine mounts=cost of material: $100?
wiring harness mods=cost of material: $50?
exhaust header=off the shelf from S&S: $300 max
new plumbing=cost of material: $100
engine cover mods=cost of material: $50
new chain=I'll buy a new one each year anyway: $0
misc expenses= this one might be a bit low
: $500 min
dry sump=get a Yamaha: $0
My total cost= $1100 plus the engine cost but, like I said, this should be similar regardless of the scenario.
I understand not everyone is able to do this work themselves and that we do need to do something soon.