Okm, well the Mobily or other hot spot is a router as well, you can connect and adjustable number of devices to it, so you don't need a 2nd router
But that said I do it. I have (counting devices that don't actually eat data) 11 or 12 devices connected These include
THe Nano-Sattion
The Router
A Switch (These first 3 just pass data)
Two DVR's (They "Eat" one NTP (Time) Packet a day,, Other stuff is all internatl)
A rinter (eats only internal data no need for internet)
My "Shack" comuter.. Controls the radio only "eats" Windows updates.
This Win-10 Lapto. (Eats most of my Text based data)
Chrome book (most of my Grahic data)
Win-7 File Server.. It eats a bunch (Coule meg) every two weeks, rest of the time just background stuff (Time and updates) It also serves up files to the DVR's (Why it's there) and allows me to control them from other connected devices. (Very advanced system. You have heard those ads for expensive subscription services "Only _____ Lets you do all these things.. WRONG, I do 'em, 25 dollars a year and that is optional).
A Tablet (Background an pandora on Sunday AM)
And my Cell Phone (Currently acting as a hot spot)
( don't stream video less I have to and then ti's shorts.