I have a TGIF Spot for my ham shack.  I understand I could apply a Profile for a mobile set up to tether to my Android phone for use in my car.
What are the pros and cons of a SEPARATE hotspot for use in the car compared to creating a second profile within my existing Spot in my shack - aside from cost?  Are there any good Android phone/Spot tethering instructions for the TGIF Spot?

I know my Spot could be moved back and forth from house to car, but I have it nice and firmly attached to my home rig - I hate to move it around and switch things up.

Any hot spot I would use for the car, if not this one, would be 1/3rd or 1/2 the price of the spot.  Any suggestions?