Definitely ! I guess the first thing to establish is what kind of cost we're looking at - Heroku seems to have $5, $25 and $250 per month price bands, although I wonder if there might be somewhere less expensive offering a similar service.
I'm not any kind of coder, but perhaps the tool needs to have a sign in option (with Hivesigner and/or Keychain, ideally) and a strong nudge to get a delegation or contribute SBI's. The all we need to do is do the maths and work out what level of delegation is needed to cover the cost !