most places you want to get into are at least going to have a camera covering the door, a maglock and maybe a pressure sensor plate on the approaches to the doors if they're particularly edgy about who comes a-knocking.
Some examples of places that are likely to have at least basic security:
-BTL houses
-Drug labs
-Ganger base
-Warehouses
-Industrial facilities
-Commercial property
On top of this, there will be a few places even in the barrens that will have need of having some kind of host, even if its an old antiquated node running menial tasks.
Places like night clubs, street docs, haulage firms, industrial firms etc will all have some need for processing and data storage, or even just a straight up marketing campaign or platform to gig/performance listings public etc. More security conscious places may have some basic security drones rolling about too, perhaps a rail mounted sentry drone or a doberman or two to deal with.
Pretty much everyone will have at least a shitty commlink to hack as well. should be plenty of stuff for a hacker to deal with, just remember to scale the device ratings down to meet your hacker's abilities though!