osb/app/Console/Commands/InvoiceEmail.php

<?php

namespace App\Console\Commands;

use Illuminate\Support\Facades\Config;
use Illuminate\Console\Command;

use App\Models\{Invoice,Site};

class InvoiceEmail extends Command
{
	/**
	 * The name and signature of the console command.
	 *
	 * @var string
	 */
	protected $signature = 'invoice:email'
		.' {--s|site : Site ID}'
		.' {id?}';

	/**
	 * The console command description.
	 *
	 * @var string
	 */
	protected $description = 'Email Invoices to be client';

	/**
	 * Execute the console command.
	 *
	 * @return mixed
	 */
	public function handle()
	{
		Config::set(
			'site',
			$this->option('site')
				? Site::findOrFail($this->option('site'))
				: Site::where('url',config('app.url'))->sole()
		);

		$o = Invoice::findOrFail($this->argument('id'));

		try {
			$o->send();
			$o->save();

		} catch (\Exception $e) {
			dd($e);
		}

		return self::SUCCESS;
	}
}