Help me clean my Airstream find

[chapparel]

This Post is not in reply to another post but I need help with a wonderful Airstream I just Purchased.
Ir is a 1968 28' Ambassador. This is the Problem. It has been sitting for about 10 years with no use, except for the Gross invasion of Rats and Mice. They have litterally used every place they could to make a mess of everything.
Droppings and urine, in some place inches thick. What I am worried about is the under pan and how do I clean in there or should I worry about it.
I wish I could just go in and use a power sprayer to wash every thing out.
I have removed most of the carpeting and washed down most of the cabinets but have not finished it. How about worring about the Hanta Virus. Are only some Mice and Rats infected with this virus or is this a problem nationwide. I have been using a cover for my nose and mouth. Please, any suggestion would be appreciated.
Also, How can I check the electrical to see if they have chewed through the wiring. Also, I need to check the plumbing and any help on this would be appreciated. I am just a women in her later years but have always liked to do it yourself and love to take on new challenges. Please HELP