> We've been recently working in a FREE hosted version [...]
Oh no, you make it sound like this is a good thing. It only means I can't take you serious.
Don't make it free. That is not a feature for a computation environment, it will only cause headaches on your side and people get wrong (bad) impression about the performance (assuming free accounts get some limited shared instances).
I rather pay a monthly fee for a good application, than a pseudo free instance, where you get limited resources. Do you have your credits forever?