Storing Motorhome

I have a small Winnebago also and live in Central FL. My RV habits are different than most I read about here. I have inside storage for it (commercial facility). I use it all winter for trips at least once a month and exercise systems monthly whether I need them or not (generator, AC). I use the propane furnace during the winter and forget about it the rest of the time. During the summer hot months I usually do not use it for trips but monthly I take it out for an RV day. I drive it somewhere for about an hour, run the generator, look everything over and do whatever needs done. It is a pleasant exercise. Me and my RV. I do no special battery charging other than the RV day. I bought it new and have been doing this for 4 years with no problems. I empty the water tank and do the sanitizing once per year at the beginning of my winter season, using 1/4 bleach per 10 gallons (so 1 cup for my 40gal tank), sit for a few hours then empty, rinse, empty, fill. The water tank valve is in a cubby under the foot of the bed mattress platform right next to the pump. Of course it is awkward to get to.
Oh and I forgot -I use marine grade Stabil in the gas to keep the generator running well on my usage schedule.