Drupal 7 Content type restrictions

Question

How to add a restriction or validation for a content type that can be add only one content.

ex - Hotel web site room listing page should have only one content. After added once that only can edit or delete.

(I am a beginner for the Drupal)

Answer 1

Have you checked Node Limit module? I have never used it, but seems suitable for what you want to get.

Hope it helps.