Pros: Steady, reliable income stream. Bank Financeable. Ownership does not drive the business, so you can buy one and be assured the customers will stay, which is not always the case. (for example, an appliance repair business might only have customers because the owner is known for being a dang good repairman, or a landscape company's biggest clients are people the current owner went to school with).
RV Parks are real estate based, so the value never goes to zero. It requires no special skills, no special training and no special licenses to become a park owner. One big plus is you can live in some great destinations and make money while living there.
Cons: You are dealing with the public and a certain percentage are, how should we say it, the little round area in the south end of north bound mules. Problems need to fixed immediately. No power or a stopped up sewer line cannot wait. Not a get rich quick scheme, you won't suddenly develop a better mousetrap, go public and become a billionaire overnight. Oh, and that great place where you live, you are often too busy to really enjoy all the benefits of living there.
Pricing: Parks are generally trading for between 8 and 11 times NET income. That is the number I look at. Everything else (X times gross less Cost of goods sold, $$ per site, real estate value plus x times earnings etc. are much more subject to a bit of manipulation, for lack of a better term. ) Things that factor into whether or not you should pay 8 times earnings or 11 times earnings are things like deferred maintenance, whether or not there is additional value attached, besides the park (quality owner housing, potential for future change of use to higher valuation, unutilized or underutilized profit centers, special equipment etc.) And since it is real estate, three of the most important considerations are location, location, location.
What to watch out for: Sewerage issues are the number one problem often overlooked. Expansion might not be possible if the park cannot meet the environmental concerns currently in place. A current septic system is probably grandfathered in and fine, but expansion takes it to a new level. Water, be sure it is plentiful and problem free. Situation specific income that may not continue. Oil field workers making up the bulk of the income probably won't continue forever. Don't rely on a one year bump in income without a lot of research. Could be they expanded, improved advertising and now have that business ongoing, or there could have been a big festival or something else that gave them a one time boost.
Other notes: Something I found a bit strange is the fact that seasonally open parks and parks open all year command about the same multiples. Personally, I would pay more for a park where I was only open 6 months than I would for a park that was open all year long. employees are problematic at seasonal parks. You really can't hire full time, so you have a lot of turnover with the training associated with that turnover. The good news is you can usually get great workampers, but there is still a learning curve.
I wouldn't own more than one until you had a great handle on operating a park. Remote management will cost you a great deal of profits. A manager cannot know your mindset, so they will either defer some maintenance to keep profits up, or spend excess money on repairs and the like that could be handled by the staff. It is just too easy for someone to spend your money. In my opinion, except at the big corporate level (and read the reviews about those parks) RV parks are really a hands on venture.
All in all it's a really good business, good luck if you move forward.