What would the charge out costs be?
I am no financier Band but if you were lucky enough to get 800 paid hours per year, $25.00 p/h would give you a 5% return on your 400K investment. If you then wrote them off to be half value in 4 years, add another $40.00 p/h. This assumes you had the $400K to stump up in the first place. Adding finance boggles my mind.
It suddenly makes a flying school using a couple of Jabby's a better sounding proposition.