A "privately owned skifield" is essentially a company.
So is [[Microsoft]].
Ahem.
Deliberate misunderstanding of the problem doesn't solve it.
And so is [[Alpenhotel Oberjoch]] and about some ten millions other hotels. Most, even the smallest, companies in tourism have some secondary source at hand (e.g. the web site of the town, they are located in), so that by literal reading of the guidelines, they are includable.
Regards, Peter