What you guys think about the cold wallet method that came to my mind:

Having two electrum wallets on same mobile one on the work space and one on the main space , one of them without any access to internet and disabling access to internet and one with internet access , the one without internet access having Bitcoin private keys and the one with internet access having master public key , using the offline wallet for signing transactions and using online wallet for broadcasting the transactions, what you all think about this method?