We have owned a 2106 DS for 2 years and love it. The 2106 is the newer version of the 2101. It is just myself and my wife along with a dog. So a very similar situation to yours. We have had zero issues that required a professional repair. I have, however, done a couple of upgrades. Replaced the shower head with an oxygenics head, and replaced the plastic toilet with a porcelain toilet. Also put up some towel bars.
The 2 things that I would change if I could are the tankless hot water heater and the size of the grey water tank. The hot water heater works but is too sensitive to water flow so it can oscillate on/off if the water flow is not within a pretty narrow range. We have worked around the size of the 25 gallon grey water tank with a tote but it would be nice to not have to deal with that every 2-3 days.
Hoping you get an early spring.