Valuing Self Storage?

Found a nice park in a good metro area. Comes with a complete self storage complex with revenue. Have NO idea how to cap this part of the deal. Ideally I would split it off into two separate contracts and entities, but I’ve never value these kind of businesses. I’m not really interested in the self storage biz so much as the park. I searched and didn’t see that much info. Happy to hear what people have done in the past.I continue to stand on the shoulders of the giants here :-)Ari