is there any disadvantage to using free hosting like webs.com ? plus they also have tools to where you can build your own site. so you can get it all for free

Webs sites are usually very heave and slow.
Besides that, you can only have a sub domain for free. That means you get .webs.com at the end of your domain name and that my friend is a very long thing.

There is always a big difference between professional hosting and free hosting... its in the terms and conditions which you might not bother to read. do your research but dont cut cost to regret later cos you might regret it later. Just saying

It is always better to go for paid hosting as it gives you some peace of mind. Most of these hosts sooner or later stop giving out and supporting their free accounts.
Besides isn't it better and more professional if your website is 'www.mywebsite.com' instead of 'mywebsite.theirwebsite.com'

For serious business get a paid hosting.