Unlimited domains hosted at lowest price
If you plan on hosting lots of domains you really cannot go wrong with HostGator. They have been the #1 choice for hosting PBN's for years as they have unlimited plans for a few dollars a month and single click installation of wordpress and other CMSs
Hostgator also have plans for resellers and dedicated servers, they cover pretty much all bases with unbeatable hosting deals.
Great service and Support
Hostwinds are similar to Hostgator in that they cater for all hosters ranging from inexpensive unlimited hosting up to dedicated servers. Great support
Hostwinds is a great host for spreading your PBN across different hosts without spending too much.
Inexpensive VPS Plans
If your needs for hosting many websites has exceeded what a single host such as hostgator can provide or you just need a little more control over your hosting environment then a VPS could be what you need. Hostamus have the some of the best prices on virtual servers around.
There is no coupon necessary when purchasing through the link above. Hosting Server deals from $15.95 is unheard of.
All round affordable hosting plans
Host Stage is another web host providing impossibly affordable servers. With lots of options for different configurations you should be able to find one that fits your needs.
Host Stage also have some very good deals on shared hosting and Windows hosting for running software on.
Great Support and free cPanel
Berman Hosting have built up a reputation for providing great support and reliable hosting. Berman Hosting also have a great range of affordable hosting.
Most of their hosting plans offer reduced costing when paying quarterly or yearly so check out the pricing for these payment plans, it could bring the overall cost down noticably.