With the seasonality and shipping times you're probably only going to
have 2 reveue generating weeks out of every 4 on average. Plus,
service will run $50/mo.

At $75/wk you're looking at:

$75 * 2 = $150 - $50 (service) = $100 profit per month (and we haven't
even considered shipping, insurance - these things will break-,
advertising, or what your time is worth for managing all of those
shipments) At $2500, you will go 2 years before paying for the unit
and turning a profit at which time there will probably be a newer unit
out. I think we just answered the question why they are not for
rent...

--Dan