How can I find the perfect keywords to rank for?

[Hospitality]

You can use Moz or Google Ad Words. For example, in Google Ad Words just try to come up with a few searches you may use as a search and Google will give you a few suggestions. Select each of these suggestions individually and you'll be provided the number of searches per month. This will be helpful to understand the most popular keywords to go after. As it's been mentioned before, try to go after the long-tailed keywords.

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Charles
Wholesale Rental Supplies
Wholesale Hotel Items

[Overflow Cafe]

Always use keywords that actually exist on your website so google can rank you for them. You can use UberSuggest. it's a great tool for keywords.

[Willie Posey]

Pick your keyword keeping the mind the search approach of users. And, yes long tail keywords give better results than short-tail keyword.