How to use Braintree for buyer to seller payments without Merchant account?

I'm developing an Android application for Property rental Management where Tenant will be able pay Rent directly to Landlord . I would like to use Braintree as it supports Credit/Debit cards , PayPal & Google Pay.

What I have tried so far ,

1. I already have tried creating sandbox account of Braintree & performed simple payment transfer to single merchant.
2. Explored Stripe Connect but looks time consuming documentation.
3. Also explored Braintree Direct but it shows documentation same as single merchant payment transfer. I've followed steps mentioned & it lead me to implementation of single merchant payment transfer.

My questions:

1. How a user can send payment directly to another user using Braintree either through Android SDK or PHP sdk on server ?
2. Do I need Business account of Braintree to implement above service?
3. Can you recommend any example regarding buyer to seller payment integration regardless of any programming language but using Braintree / Paypal ?

4. Here is server code to process Payment according to documentation:

   $result=Braintree_Transaction::sale([
       'amount'=>$amount,
       'paymentMethodNonce'=>$nonce,
       'options'=> [
           'submitForSettlement'=>True
           ]
       ]);
   

5. I'm open to Any other solutions if it fits my needs with example or reference document.

So , is there any parameter to supply through which we can transfer payment to receiver directly?

I know there are lots of questions above but I'm really confused as there is no proper documentation on android app & not found proper example to integrate.

Any guidance would be helpful.

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