How Good Is Using Whm/cpanel For Selling Hosting

I am doing some part-time work for a small web design company that is hoping to get some extra revenue by selling hosting to its customers after it designs the sites for them.

They wanted to know what I thought about it, and so far I've said that it seems like getting a dedicated server (from a larger provider) for about $200/month would be a good fit. If they charged $20/month then they'd make it up after only about 10 customers, and they have many more than that. And with a dedicated server they could put a lot more than 10 accounts on the site.

The thing they're worried about is having to actually administer all those accounts. The sense is that their clients are pretty low maintenance, but if you give one malicious user an FTP account into the server, they are (understandably) worried about that person's ability to affect the entire server.

The dedicated server provider I have in mind provides WHM/cPanel for a relatively small fee, and my thought is that this could address that problem.

So (having only used WHM/cPanel in passing myself), what I'm wondering is, is this the sort of thing where they could give users access simply by giving their customers a cPanel account, and not worry too much about security or configuration (keeping in mind that the dedicated host also has security people working)?