Land Purchase S/Trader or Ltd Company

I have a potential new client, who has already purchased a piece of land, for keeping equipment on.  I have no clients who own Land, but do understand it to be a non-depreciable item, listed as an asset on the balance sheet.  However, the client has already started to trade, and I feel that in the early years of trade with a low profit or potential for a  loss, will be best set up as a sole trader.  As if the business does not work out, the losses as a sole trader can be C/Fwd.    From the conversation I have had on the phone, the client seems more concerned with protecting their personal assets and perhaps setting up a Ltd Company.  With the land already bought as an individual for business purposes.  Where the client to then rent this land to the Ltd Company, although there would be a 20% CTax saving on the rent payable, would still incur some tax and possibly NI, after the clients personal allowance had been taken into consideration.  Does anyone have any past cases such as this, and how things went?  I am unaware at the moment if the land was paid for in full or via some sort of loan.  PS My not being able to press return has come back, sorry for the block text).