Gumbo,
Around the mid nineties I breifly gave up the touring caravan due to family health problems and bought a static.In my opinion it was abig mistake, managed to sell the static at a considerable loss two years later and went back to touring van.
Initially I took up the site's offer to let out the van on my behalf when I wasn't using. They would collect the money, clean between lets, ensure a supply of propane etc. For this they took a percentage. No problem with that but it soon became obvious that some of the people hiring the van obviously didn't give a monkeys about other people's property. It seems the attitude was "I' m hiring it, I'll do what I like".
Within weeks, after damage to the van, items being stolen I cancelled the agreement with the site to allow them to let the van. As I still needed to hire out the van to pay for site fees I started to let it out myself. I needed to advertise, collect fees and clean between lets. Minor items still went missing and it became obvious the van would not remain in good condition for long if I continued to hire it out.
Also if you are hiring your van out it seriously limits the personal use you can get from it.
Other things to look out for are:
Some sites only allow vans up to a certain age on their site, a ploy to get you to buy new on a regular basis.
Others will give you a prime pitch, good location, then after a period of time e.g. 2 years will move you unless you again buy a new van.
Site fees. You really don't have any control over how much of an increase you will face each year.
Neighbours. Initially both vans on either side of us were privately owned.Nice people, the area was peaceful and relaxing. Then one was sold on to someone who let out their van on a regular basis. Don't know if it was family or friends but they changed a peaceful quiet area of the site into somewhere you really didn't want to be.
Some sites also have a clause in their terms and conditions giving them first refusal on your van should you want to sell it (at a price that is more suitable to them) or terms that they need to agree to accept whoever you are selling to.
Did it once, wouldn't do it again. Advise your friend to very carefully go through the small print of the agreement with whatever site he has in mind.