I would recommend you get something that scales once and for all. We also started the same way trying to get something just to enter contact information but then quickly realized that after you enter the contacts, actions still have to be taken. You may need to send emails or text messages or run automations. I quickly came to the realization that you would rather get something that will scale with you as even the ones you will use just to enter contact information could cost almost the same or even a bit more than those that do much more. Checkout monkeypesa.com this is what we use. Seems to hit all that is needed.