Hello,
I calculated all the features in ideal hours and made up 3 possible steps of the project.
1 - All that needed for translator interface (data model building, sing-up / sing-in / billing) – 1040$, 2 weeks
2 - Main features (manage projects, plans, translators, make a payment) –1680$, 2,5 weeks
3 - Extra logic (download/upload files, ratings, extra social login, details about translator) –1280$, 2 weeks
Keeping in mind, that it needs to be done with Vue.js and back4app.com.
Ira