can I use a rbw30 wall plug satellite w/a motorola mt7711/ac 1900modem/router if so how???

If you've got an orbi router, sure you can. 

If you don't, then no you can't. the only 2 orbi devices that can run without a orbi router are the RBR40V and the RBS50Y as they have an extender mode. None of the rest currently have extender mode. They need the orbi router to function.