Assuming you don’t have your own web server and need to rely on a hosting service, you need to understand that the old saying “You get what you pay for” is often true. Your first Drupal site might not be your last once you get hooked on the possibilities Drupal has to offer. Make sure you are buying a hosting solution that allows you to expand the number of sites without additional costs. Look for one that allows you to decide which version of PHP and MySQL you want to run. Evaluate the support processes and turn around time. What will they do for you as part of your monthly fee?