If you want to start building your own Yelp like directory for a particular city and industry but you are on a tight budget with limited tech skills I would definitely suggest WordPress.

But it can be tricky as WordPress has several different options and you can get easily lost and even it could end up getting very expensing if you don’t play it right.

Here are few helpful resources for you to go over and decide.
Adam from WPCrafter has done a very good job comparing top 3 WordPress products to build a site like Yelp, watch the full video here https://youtu.be/Ykid7UTXxYI

Then you can watch a step by step full video on how to build the directory here https://youtu.be/sRbUsQXyEOc

There was a detailed article by Codeinwp on the same topic that can be found here https://www.codeinwp.com/blog/create-a-local-search-directory-like-yelp-on-wordpress

Hope this helps you get kick started with a tight budget.