Oh, you live in an RV park? So you're looking at a house call to replace the converter.
Put the charger back on the battery. All you're doing by watching and waiting is running down your expensive new battery and ruining it. Keep it charged. The converter is not going to magically start working again.
You really need to get somebody in there to look at it. The hard part will be finding someone that's qualified to make a house call. Check with a nearby RV dealer.
Unfortunately you're not going to get out of this for less than a few hundred dollars.
I really really really don't think you should try replacing the converter yourself. It's going to be nigh on impossible to talk you through it on this forum, and you don't have the experience yet to go it alone. Make a mistake and you could damage the trailer's electrical system, or worse, burn it down, leaving you homeless.
This is important. You really need to find someone that knows what they're doing, not someone who will do it cheap/free because they think they can. With the alternatives being some temporary financial hardship, or homelessness, I would take the financial hardship.