The cheapest wordpress hosting provider in today's market offering the best performance speed, features, pricing model is Dreamhost according to most readers ratings.
Dreamhost cheapest wordpress plans come with the pricing of $2.59/month where you can host one single wordpress website with one free domain and site builder. The good part about Dreamhost is they are one of the few hosting providers officially recommended by wordpress itself.
Their basic wordpress plans comes with flat 97-days money back promise guarantee which is equals to almost 3 months and one week promise guarantee.