Thanks, Bumpyroad - I'm sure it would be pretty easy for someone with electrical skills. But just plugging into 30A shore power and then having the three 15A female plugs for my extension cords is really what I'm looking for - no wiring needed on my end.
I actually emailed the supplier of the Marinco cord - asked if they would give me a discount if I paid by check. We'll see what happens.
The Marinco not only offers three 15A outlets so I can take advantage of the full 30A hook-up, it's also GFCI - so I guess you DO get what you pay for.
I've invested about eight hours of research time now - think it's time to just buy the $91 item since it really does do exactly what I'm looking for.
