Customize Android Project - Urgent Need

we have video conferencing app which has admob integrated. need to make below changes 1. Integrate Admob with Fb Audience Network and Startapp, all three working together. First ads should be pulled from admob, if admob returns no ads, then pull from startapp, if startapp says no ads, then pull from fb audience network, if aud network says no ads, then no ads process should be followed. 2. Add Option for "Invite Others" ==> akin to share app on Home screen, next to 3 prominent buttons. Add "Share" Option on [login to view URL] screen after continue and as mentioned below and discussed. 3. Add Subscription Option - Buying Subscription should remove ads, and enable PiP - 3 subscriptions - Monthly, Quarterly, Annually - PiP already integrated and disabled in free version. 4. Add Support Webview Button always visible on top, which should open our support portal : [login to view URL] within the app. 5. On Settings page add two menu options which should take to subscription screen for Premium -> 1. REMOVE ADS 2. ENABLE Picture in Picture 3. Go Premium 6. Change banner position to bottom of the screen like all other apps, which is always visible.. 7. Minor Customizations if any to submit app to app store Our budget is INR3500 for this task and need this urgently. Bid only if you can do this within that budget.