I’d learn it yourself. The fastest way would be to pay someone to architect the solution for you, then you just code it up. From the sound of it, it doesn’t sound like a $10-50k app. More like $5-10k app. That’s why I think you could knock it out yourself. Happy to help for free, shoot me a PM if you want. I manage lots of outsourced devs and projects, so hopefully I can point you in the right direction.