No brainer in my books, if the portable EVSE is already paid for
I use a Zencar 32A portable EVSE for daily charging, I've never had any issues with it. When we go camping, I take it with us in the car. It's actually wall mounted all the time and plugged in right next to my breaker panel, since the plastic box that contains the guts of the EVSE has keyhole mounting slots built right into it.
If your stock 2018 EVSE ever gets stolen or damaged, just replace it with a Zencar 32A for $300 US (delivered right to your door) or buy a wall mount EVSE at that point.
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV