This is worth a try. Make sure you reach break even rapidly so you don't get stuck in burning money. If you already have a server available, then this is pure profit.
This is also a good opportunity to practice startup launching. Identify your target clients, where they are, what they are looking for, etc. Create a landing page with MVP offer description and subscription for availability notification. Check patio11's advices on optimizing the landing page. Then spread the word. The subscription feedback should give you a traction feedback. This should be enough to deduce the fee to reach break even as you launch. Assume only a percentage of subscribers will make the jump. If you can break even with only 10% subscribers adopting it, then things are sound.
This is also a good opportunity to practice startup launching. Identify your target clients, where they are, what they are looking for, etc. Create a landing page with MVP offer description and subscription for availability notification. Check patio11's advices on optimizing the landing page. Then spread the word. The subscription feedback should give you a traction feedback. This should be enough to deduce the fee to reach break even as you launch. Assume only a percentage of subscribers will make the jump. If you can break even with only 10% subscribers adopting it, then things are sound.