The cost of common shared hosting starts at 3$-10$ per month. While this is a cost many can afford, there are many out there that find it hard to spend 120$/year. Well, in the past 4 years I have used the idea of hostMates very successfully, saving money and learning from my mates.
Please note: HostMate is an idea, best practice if you want. It is not a product or a service, although someone might want to provide this service.