I've operated several of the Ranger Tugs. 🙂 My favorite has always been the R21EC. 😀 I feel it is the best handling, extremely easy to maintain and easiest to just jump on and go. I'm sure the owners of the larger Rangers will take exception to my "best handling" remark. But, the R21EC has a much larger rudder in relation to the boat size than the other tugs. As a result, it steers better in all conditions, especially with aft quartering wind and waves. The only place it gives up any handling prowess is in close quarters where the other Ranger Tugs have both bow and stern thrusters to use. A good driver/pilot with a R21EC with its bow thruster will never notice the difference.
I'm on my second R21EC. Considered the larger models several times, but never bought one. Mainly because I'm a sailor at heart; it's been difficult for me to go all power; give up sailing. I have an extremely nice, easy to use sailboat docked about 100 yards from my house. My R21EC is docked 15 to 20 minutes away, by car. But, I find myself using the tug when the wind is howling, the waves are breaking, the sun is boiling or the temperature is cold, including freezing. And, when other folks don't care about sailing, or when I'm lazy. 😱
I've never used the marine head and galley on either tug, so I can't address winterizing them. But, it took about 10 minutes to winterize the engine and bilge; took about a gallon of antifreeze. It's so simple, one can go out in freezing weather and then re-winterize quickly and cheaply afterward.
I could go on and on about all the Ranger Tugs, especially the R21EC. b/t/w my first one could exceed 10 knots going down waves in a good breeze; it would surf. Haven't had the latest one out in those conditions, yet.
gene