Yeah, I have a 50 amp I had installed in the garage for a welder when it was being built, since then I used it for a hot tub and now I've gotten rid of the hot tub. Soooo, I will be turning that into a 20 and 30 amp. I'm not electrician, but I think one of my buddies said that would work. Then I'll run 20 to my new shed and put a 30 on the shed for the trailer, hope it works. This brings up a question I have, is it good to leave your trailer plugged in all the time to keep your batteries full?
It is
NOT good to leave your trailer plugged in all the time to keep your batteries full. I ruined two sets of expensive RV batteries before I figured this out. Over a fairly short period of time you will cook the water out of the batteries, and then they are toast.
I found something called the Battery Tender. It will keep your batteries fully charged all winter, and will not run them dry. It is different than a traditional trickle charger, and well worth the $$ it cost. I have had the same set of batteries on my trailer for 5 years now, and they are totally healthy. I permanently affixed the Battery Tender to the frame, right beside the batteries. I leave the leads hooked up to the batteries, and simply connect to the AC extension cord when the trailer is being stored.
I bought mine at Napa Auto Parts, but you can find them in most auto parts stores. Here is the model I use:
https://www.batterymart.com/p-022-0185g-dl-wh-12v-1_25a-int-battery-charger.html