I think there nothing that is "wrong" per se, but some improvements can be made. * 따뜻한 환대를 해서 정말 고마워요! If someone does a favor for another, we usually include the auxiliary verb 주다. So, we almost always say 따뜻한 환대를 해 줘서 ... in this situation. * 모두를 다 너무 사랑해요! Although it is a fine sentence, in real life we would probably say 모두들 너무 사랑해요. It is hard to explain but 모두들 너무 사랑해요 is just more natural sounding. Meaning-wise, there is no difference. * 여러분이랑 교회랑 자기 가족에도 다 축복해 드리세요! - This is fine as it is.