how to make subquery for Eloquent\Relations in laravel

I have three tables

**donates**
id| invoice_id| amount

**donate_project**
id| donate_id| project_id| data_close|

**project**
id| title

I need to get Donates from Project only those which are group by (donate_id , project_id) having (count(*)%2 != 0) like my query below

My code in Project model is valid

public function donates(){
    $id = $this->id; //id of project
    return $query = DB::table('donates')
       ->select('donates.id', 'donates.invoice_id', DB::raw("amount"))
       ->join('donate_project', function($join) use $id {
            $join->on('donate_project.donate_id', '=', 'donates.id')
                 ->where('donate_project.project_id', '=', $id);
        })
    ->groupBy('donate_project.project_id', 'donate_project.donate_id')
    ->havingRaw("count(*) % 2 != 0")
} 

So I try to do like donates() and returns only Collection but I need to return (Illuminate\Database\Eloquent\Relations\Relation)

public function donates()
  {
    return $this->belongsToMany(Donate::class)
        ->getBaseQuery()
        ->selectRaw('sum(donates.amount) as aggregate, donates.id')
        ->groupBy('donate_project.project_id', 'donates.id')
        ->havingRaw('count(*) % 2 != 0');
 }

Is it possible? sorry for my English:)

via Mykhailo Basenko