I bought my house in 1984. As of today, I haven't even put any nails in the walls to hang photos.
Can't imagine drilling holes in my Bolt. I DID mount a trailer hitch on the back so that I can tow
a small trailer, usually with my motorcycle on it. Not sure how much traveling you plan, or what
you plan to put on the carrier, but, they have hitch mounts that will hold quite a bit. I believe
that the tongue weight for my hitch is 200 lbs. The Bolt hitch with 200 lb. Tongue Weight is
available from ETrailer for $131. I paid $100 for install. Might be a little more or less if you
drive in to a trailer shop locally and order hitch and have installed from the same place.
If you end up with the hitch mount, don't forget to add it's weight to tongue weight.
Another option would be a small(ish) Teardrop trailer. I didn't have lighting harness
installed when I did hitch but, so far haven't had any issues. Did the same on my
Volt with no lights never had issues from law enforcement with it either.