What is the average number of boat break downs per day or per week or
per month or per season or what is the incident % rate of boat break
downs when they need to be towed?  Rivers, Lakes or Ocean or all. 
Outboard, Inboard, Sail, mainly or will take any numbers you got. 
Opening a marina and need to know how many boat breakdowns there are. 
Thanks, Charles

Marinas. Great moneymakers. As long as you have lifting facilities. As
a former charter skipper, I've done it all as far as how much it costs
to maintain a vessel, and the only winners are those who can afford to
set up the infrastructure for penning the vessels and lifting them for
maintenance. Most Boat owners try and save costs by doing most of the
work themselves, but they HAVE to rent the pen or mooring and they
HAVE to get drydocked on a regular basis. Thats where the money is.