Good for you. Don't think you'll be unhappy. Manuals - available in PDF form from Bigfoot Owners Club International.
Questions about fridges, hot water heaters, furnaces, and stoves can be answered here and on BOCI. Interior equipment on these trailers is pretty generic.
Happy to related any personal 'victories' or defeats re my trailer.
Been to Eastern Alaska and the Yukon Territories with this rig. Never gave me cause for concern, ever!
When the pall of Covid finally lifts may I suggest strongly that you try to get to a BOCI mini rally
or meet. Never met so many nice, like minded people. The rallies usually have a 'Show and Tell' afternoon where you can look at other peoples rigs and solutions to problems. What an eye opener!
Feel free to pm me.