Customization Vacation Rental Website wanted

Hi,
I am working on creating a website where people can go and post their vacation rental property for rent or sale. I want to make this a free service to my website subscribers.

You can see my current website at vacationrentalsunlimited.webs.com

I would really love to have it where subscribers can post and edit their own properties. I can only post my properties in the "store" that the website I am using provides.

I would really like my website to fuction like this website
redweek.com

AND if someone knows how to make the API code where I can cut and paste in an the option that I need for my website visitors to come and post their rentals and edit them and also where they will post in real time.



If anyone can help I would be really grateful!