Be sure to choose a company that is a member of the NCC - then you will know that you are dealing with a professional business with specialist knowledge about caravans/caravan holiday homes. You will find a current list of NCC members on the NCC website.
Finance: Caravan holiday homes are not eligible for mortgages, but other forms of finance are available.
Insurance: You may find it easier (and possibly cheaper) to use a specialist insurer for your holiday home. Alternatively, your park may be able to offer you competitively priced insurance for the holiday home and its contents as an add-on to your pitch fee. You can choose your own insurer, but the park may wish to check that your cover is adequate.