Thread:ApplePieNation/@comment-37446068-20191016172514/@comment-24577221-20191016223817

Without a Unity Tree, any monster that's in a hotel is essentially invisible. It doesn't generate coins itself, and it doesn't help any other monsters generate coins by increasing their happiness level. So in terms of what you're asking about, the hotel is a 4x4 empty square on the map, and any monsters inside it don't affect your results.

The question of "what is best" depends a lot on how you play. If you're on frequently, monsters that generate coins qiuckly but have a low limit are best. If you only play once a day, monsters that generate more slowly but have a high limit are best -- "slow and steady".