Well, you seem to be going into this aware of the risks of using a static as your home - which is the first step. Having sufficient funds to take the gamble is the second step.
Using your daughter's address for the purpose of owning a static - just be aware that the better parks will probably ask for documentary proof that this is a valid residential address for you (utility bills in your name, etc.) Your residence can be in this country or abroad - so if you rent in Spain and have bills in your name, then the Spanish address can be used (a static as a UK base is often the first choice for expats).
You need to decide where any written communications relating to your pensions, banks, driving licence, medical reasons etc., etc will go to - a holiday static will not usually have a postal address, and very few will permit delivery to the office - and for important communications, this is not really a secure system..
IF you decide to set up a postbox address, do this before you sell up, a PO box also requires a residential address.
As far as buying a static goes - somebody much wiser than me said there are three rules.
1/ Read the contract.
2/. Read the contract.
3/. Read the contract.
I will add - make sure you read, understand and agree with ALL the rules, terms and conditions before your commit yourself. If there is anything that is important to you that is not in the contract, then ask and get it in writing.
Make sure the park is properly licenced/has planning permission for the type of use - otherwise you may end up getting caught in an argument between the park owner and the local authorities.
The order of importance when looking:
The area - whereabouts do you want to be? What local facilities do you want/need?
The Park - what type pf park - lots going on, or very quiet?
The pitch on the park - what is the view, what is adjacent? Do bear in mind that an empty field may not always be an empty field - it could turn into an extension of the park, or even a conctruction site for housing. And if it is arable land, harvesting time is both noisy and very, very dusty.
Finally, the static itself - the nicest static in the wrong place will not make you happy. A static that is almost-but-not-quite-right but that is in the right location will make you happy.
Decide whether you want your family to be able to use the static when you are not there - some sites allow this, some don't.
Do you want to rent it out? If not, do you want to be on a park where other statics are used for renting? Or do you want an "owners only" park?
Some parks (usually the more expensive lodge-type ones) have statics that have their own land-registry type lease, which usually gives a much longer right of legal ownership.
Not only check how long the static can stay on site, what is the open season, are there restrictions on how long you can stay at a time (many sites have limits on continuous stays to make sure nobody is living full time).
Do you want a park that allows dogs/cats? or prefer them not to be on site?
How important is it that there is a good internet/mobile signal?
Will the park allow you to keep your camper van on site?
Bear in mind that static holiday and residential parks are big business with a lot of aggressive purchasers (including USA and Canadian companies) actively seeking out parks where the owner can be persuaded to sell - so the small, friendly park is always likely to be swallowed up by somebody with big development ambitions (this is where knowing what the council issued site licence actually says about number of statics etc. is very useful). Plus - the new owners are quite likely to look to see who they can turf out in order to re-use the pitch, and somebody who seems to be living on a holiday site is always fair game.
A link below to NACO (which is basically an insurance company, but includes a lot of good advice).
https://www.nacoservices.com/static-caravan-adviceLinkback: https://staticforum.co.uk/index.php/topic,859.msg2351.html#msg2351
