As an experienced webmaster I recommend BlueHost service which I’m sure it would work for you and fulfill all your requirements. They have a really great offer for hosting & I have used them for over 3 yrs now, and have never had a single problem with them.

They offer a Full-featured service only $6.95 a month. You can see their Plan Details accompanied with reliable reviews regarding their service at:
http://www.threehosts.com/reviews/1st

Here I have copied and pasted its features from their website to view:

- Free Domain Forever
- Unlimited Space
- Unlimited Transfer
- Host UNLIMITED Domains (Support All Domain Names)
- 2,500 POP/Imap Email Accounts
- SSH (Secure Shell), SSL, FTP, Stats
- CGI, Ruby (RoR), Perl, PHP, MySQL
- Front Page Extensions
- Free Site Builder
- 24/7 Superb/Responsive Sales/Support
- Free Search Engine Submission

They also offer "Free Site Builder" that helps you build your web pages without difficulty if you are not skilled in using any website creating program (WYSIWYG: What You See Is What You Get). You can use this service optionally.

******IMPORTANT*******
* This service was awarded “The Best Web Host OF The Year”.
* If you sign up for this service you will have $75 credits to advertise your website with the google & yahoo search engines for free!
* You Can Register A Free Domain or Use Your Existing Domains. They Support All Domain Names.
****************************

Good Luck!
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You set up the other 3 domains to automatically forward to the actual hosted site. Many host companies offer this forwarding type of hosting at a very low cost. Should someone enter the name of one of the forwarding sites in the web browser, it is autoforwarded to the hosted site.
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