Remote Home assistance or MQTT for linking 2 instances

Hi All,

I’ve seen post’s before regarding the linking of 2 remote instances of Home assistance over the internet, and have found that it’s done via either MQTT or Remote home-assistant (HACS)

I am just wondering if there is a preferred method and why is it preferred (easy setup? robust? Secure?)

I am looking to set up an instance in my Mothers home to monitor a few entities, so if anyone has any suggestions / tutorials I’d really appreciate it.
Thanks in adavce

Can anyone provide any updates ?

Any solution?