RV (Fifth Wheel) deductions for business (Full time RV'rs)

We travel from RV park to RV park, staying for 2 weeks, and doing marketing for the RV parks & resorts.
1099 through the company I am contracted with. I am self-employed and pay for all of my own expenses, with the exception of the free site that is given for 2 weeks at each park. My wife is self-employed with her medical billing business (also 1099 contracted employee). Our fifth wheel is our main and only residence all year.
How would I enter expenses for our fifth wheel? Home deduction for both businesses, or take the fifth wheel as a business expense for my business, and depreciate? Ours is a rare circumstance, and I can't find any info on how to proceed with our taxes.