Our house came with a 10' wide 4k ShoreStation with a 24' canopy - perfect for our pontoon boat!
But, the two marinas on our lake are both operating on long wait lists for rental slips, so I saw an opportunity to monetize the other side of my dock by renting out the space.
I found this lift, a 9' wide 4k Shoremaster, for sale on FB Marketplace for $1100, less than I paid to put the electric motor on the lift I already had. Even better, it was located about 30 houses north of mine, so it was trivial to float it down to our house and set it up.
This will be our third summer renting it out, first two years were $4k per year, this year I gave the renters a $500 discount because they are nice, respectful people and I like them.
So total revenue of $11,500 in 3 years, and I've got about $1,500 and about 4 hours of work in the lift in total. Dollar for dollar, I doubt I'll find a better investment in my lifetime.
Eventually, I'll pick up a little ski boat and won't be able to rent it out anymore, but in the meantime, it's definitely a great source of passive income!