Deadline is extremly powerful, I worked with it for several years but where I am now they don't have it.
Backburner was an option but I could not use the distribuite render so quite useless.
What i had in mind was a script, like the batch render there is already in max, that opens - render and close one after the other all the max scene.
I cheked on script spot but there is nothing usable for max 2018..
@NicolasC, I have tried to install the macro you suggested me but I think it's not working, I mean nothing appears..