Ya i am absolutely agree with others. If you are planning to do like this you have paid & unpaid both options also. If you have something new strategy then others you can choose your own way. Phpld is free platform where you got script to create your site, try once & enjoy its benefits.
This can cost you nothing if you know what you're doing. You should first start by looking up free web host, some of the best are: 000webhost, xtreemhost, zymic. Then find a script for your directory site, use google to do so. Next try finding some tutorials on hosting websites, if you do not have any experience.