Android App (Astrology) | Read before contacting

Budget strictly under 25,000 INR.
Reference app "Suvich: Talk to astrologer"
https://play.google.com/store/apps/details?id=com.suvich.app.android

All the designs will be provided. I myself have made in adobe XD so colour codes and image files i can provide. The design of the app is attached.
I want to make an astrology consultation app.
The features required-:
1. Live streaming. ( Astrologers can come on live. Its like facebook live where if someone comes on live then viewers can view them and comment on there live..

2. App to app calling features. Clients who will download my app will able to call astrologers through this app directly. ( U can use agora if you want or any other api of your choice for this)

3. Payment Gateway integration.

4. Backend for me. The concept is simple. Lets assume UBER. There are three things going on. Firstly there is an app for users through which they can book rides. Secondly there is another app for the drivers. Thirdly there is a website or another app from where the uber company keeps track of how much distance the uber user is travelling, keeping track of the drivers and can fire the drivers if issues arise, and track the earnings of the driver. Same concept will also apply here. Firstly I (business owner) will choose which astrologers can be listed on the app, what are there earnings, how many minutes they are online etc. The astrologers themselves will get a separate app for doing live. And thirdly there is the user.