Do you recommend any of those for “testing purposes”? I am looking for a free hosting with a CPanel and easy WordPress installation and management; I fully understand that a testing website is not the same as a productive one but since it would up to the customer to find the best hosting to migrate (though I am helping a little bit on that project) and for my testing purposes paying is not precisely an option since none of those sites is where they would host their site at the end; I am looking for something free but that is good enough for me to work and test and to give a final demo to my customer
Many web hosting services offer so-called unlimited or unmetered service for whatever amount of bandwidth, disk storage and sites you use. It's important to understand that most terms of service actually do limit the definition of "unlimited" to what's considered reasonable use. The bottom line is simple: if you're building a pretty basic website, unlimited means you don't need to worry. But if you're trying to do something excessive (or illegal, immoral or fattening), the fine print in the terms of service will trigger, and you'll either be asked to spend more or go elsewhere.