I think its bad idea to place ads on your hosting service providing websites, there must be no ads, while if you still want then you can place them in the subpages not on main page, that way you can have some money, from ads as well from hosting,
I can see a point in selling ad space on a business/hosting site, only if the ads are well chosen, preferably manually. If you sell hosting, you may be able to get some website designers or SEO companies to advertise on your site. Still, this is probably best done by customizing the control panel, and putting the ads there unobtrusively. Something that looks more like a value added service than a simple ad.
But Google Adsense almost never makes sense when you sell your own stuff on a site.