Purchasing rv without seeing in person

If you read the fine print on an inspectors report, you will find that they also ARE NOT liable for any omissions or things that they may have misrepresented. In other words, you are paying for their OPINION as to the condition of the RV. What they see as "good" you may actually see as BAD. I am sure that you will also find that the only recourse that you have against an inspector is the return of the cost you paid for that inspection.
Spend the money and go look at it yourself. If you are not qualified to check the systems, at least have it inspected while you are there seeing everything with your own eyes.