Lisa's pretty good on this sort of thing. Before she started giving stuff away I paid her for some personalised projections for various turnovers and business types. The figures helped me to make similar decisions to yours.
One thing that puzzles me is why you would want to buy a UK sales operation and move it to France.If it's mail order to mostly UK customers I'd have thought that French postage costs might be a significant issue, depending on average order value.
Albert the InfoGipsy
"So welcome to the Citadel where the question is 'Am I?'"
My memory is a little hazy but there is an Englishman that moved his I think - AJS/Matchless parts business to France. Might be worth searching him out. Good Luck.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.