1. Yes, need to make sure your squeeze page is "responsive" if it is a normal sized webpage. Most are not. Which is not too big of a deal. The simple way is to check the squeeze page on your mobile phone, and see how it looks.

3. You can find free mobile templates to build off and tweak pretty easily for example:

https://www.google.com/search?client...emplate&rls=en

A good tip to make them convert better is making a simple poll leading into the sign up page. It builds trust, and helps justify the opt-in.

3. Yes, you can use regular hosting.