Unless you retired with a great amount of savings and a fat pension then going for the full time RV life is going to be impossible or very hard to do in your future. One way is work temporary jobs while you travel but those usually pay little to nothing and would not support your mobile lifestyle. If you can learn how to make money from the Internet say a couple of years before embarking on your new lifestyle than this is very possible.
Making money online is nothing new and is a viable business model that anyone with a modicum of discipline and a few ounces of creativity can massage these traits into a money making machine that will support you and a spouse for a independent financial life that will allow you to work and live where ever you want to. A better situation is when both you and your spouse (if you have one) can work together in creating the necessary niche websites and the keyword phrase targeted one-way backlinks that are needed to make an online presence.
With RV parks becoming more tech savvy - You can go just about anywhere now and have a wireless connection but from a little research I have found that it is better to spend the extra money and have your own satellite high-speed Internet connection due to the fact that anyone with a laptop in those RV parks can take a peak into what you are doing on your computer. RV Parks do not use secure connections so you would be vulnerable to just about anyone wanting to know what you are doing with your business.
Some RV manufactures will let you customize or create a more comfortable home office setup for your laptops, desktop computers, networking cabling, and router placement. But if you are going to be doing this full-time then you will want a nice place to work and the ability to work outside under your awning with a wireless connection.
The one thing I like is that one week you can have a riverside view while typing away on your website content or be nestled in the Smokey Mountains maintaining a online money making concern. Heck if you want to be buried in the snow for the winter you can make it up to Alaska and get settled in before the first snow fall in September and enjoy a white winter wonderland and at the same time banking money and growing your financial enterprise.
It's not hard to make money online from anywhere - It's just more interesting on the road. There is no one absolute way to create your online business - There are thousands of people making anywhere from $100.00 per day to $30,000.00 per month in many different ways. One of the most straight forward methods is Amazon.com, Google's Adsense, or Ebay.com.
Take a couple of months and poke around the Internet to see what method would most suit you and your passions and see if this way to live is for you.