I am looking for creating a vacation rental sharing platform. I need advice.

I need to build a dynamic web application for the vaction rental platform. But I don’t know how to start? Can anyone help me out? Is there any software available for this.

You’d need to provide a lot more info about what you what to need and require to have.

In what sense does it need to be dynamic?

There are a few themes on Themeforest for vacation rentals and other scripts and plugins on CodeCanyon but it will almost certainly require custom development