I just take it to the ramp and put in the water and work on the trailer!! I have a small genarator that runs my grinder!!
Painting that is easy!! 1. you take and leave the boat back a foot or so on the trailetr. You might need a bottle jack to push it back if you forgot when at the ramp. 2. get the kids dressed in there worse clothes and have them paint it for you!! When dry crank up on to the trailer the rest of tht way and have them paint were the rollers were, Finished and you didn't get a drop on you!!
I resized your pic a bit if you want to use it.