FastCloud is a basic plan and the cheapest one also.
However, it is only suitable for one website. I strongly recommend that you should not just keep your hosting plan to one website.
There are situations when you might have to test your CMS with a test domain but if you are with the single domain hosting plan you lose an opportunity to test. Also, there will be times when you would like to forward a new domain. In such a case, if your hosting plan has only website support you will be required to buy a new hosting plan. So, it is better than in the beginning itself you have a plan which supports multiple domain names.
You might be thinking that I can buy the cheapest plan right now and then later I will upgrade it.
In such cases, users upgrade the plan which is more expensive than the plan you buy for the very first time.
If you have an unlimited domain plan you have an opportunity for growth without spending a penny on the same server.
I always suggest to my users, clients and students that they should acquire the FastCloud Extra plan which has unlimited domain support plus RocketBooster.
So that one does not have to worry about bandwidth and having said that I suggest the FastCloud Extra.
Rocket booster is designated only to FastCloud Extra plan and it has many features like Memcached, Varnishcache & WAF, LiteSpeed LSAPI etc
Also, if you are a developer it is loaded with support features on Bash, Perl, Python, MySQL, Node.js, Laravel and many more.