Xlights talking prop generation program query

hi guys, i've been working on a program that makes the banter between songs for talking props.
It uses a third party subscription to another website (which costs $6/m AUD) for the API to get high quality and natural sounding talking.

you type the words you want the prop to say then hit generate, it creates the voice ( which you can preview) then you drag it to the appropriate prop and line. Do this several times over multiple props and hit generate.

the program creates an Xlights sequence ready to go. I've made a 1 min sequence in about 2-3 mins and ready to run with multiple props which is really fast.

Now my question is, What would you pay for something like this? i'm thinking a once off buy, no subscription.

another idea is a trial limit of 2 props (normally max of 10) and only 6 generations.

i'm really happy with what I've made and if it's honestly something that everyone wants, i'll look at selling it, otherwise i'll just use it for myself.

any insight as to what would be a justifiable price as a once off buy would be appreciated!

Nice work. Between-song banter is the part most of us skip because it's so tedious to do by hand.

Two thoughts from someone who sells a sequencing tool (I built ShowForged, on the Light-O-Rama side):

1. Your voice service is a monthly cost to you. A one-off price only works if each buyer brings their own API key. Otherwise every generation they run costs you money forever. Bring-your-own-key plus a one-off license is the clean version.

2. People price this against their own time. Lead with your demo: one minute of multi-prop banter in two or three minutes. That's the selling point.

The trial with 2 props sounds right. Let people make one real thing before they pay.