Hello friends

I have a farm house which is 200m away from my house and aare connected through master-client and working fine, the farm house is getting internet from DSL wire and is master, but the DSL is unstable. and I am connecting DVR in both places

I want to get a 4G modem in the house and thinking or dreaming if it can be 2 way if one drops the other will take over and give to the other, is this at all doable.

thank you very much