I am trying to start a business from a pontoon boat and want to know some ideas about how to power appliances.?

I want to run all at once: a mini fridge, mini freezer, and a few other small appliances. What do I need to know about inverters, generators, propane, batteries, solar panels, etc... ? Any good business advice? How do I make this idea work? What are things to consider if I want to sell food and other stuff?