97 Dodge Pleasure Way wiring schematic

[Puppyson]

I recently purchased a 97 Dodge Ram Pleasure Way and it seems the converter has issues. As I’m searching for a new one, I’ve noticed many 55Amp converters and only a couple 30 Amp. Being that I’m attempting to plug up to a 30Amp land service, does that mean I need a 30Amp converter? I’m seeing these things aren’t exactly cheap and I want to upgrade to solar in the near future. However, I need to have power to complete my renovation. Can I use a 55 Amp converter. Will it cause a fire? Will I need to upgrade all my wiring? PLEASE HELP!