For me the easiest and cost-effective would be to run a 5 m cable to where-ever, and only hook up the data pins with a 5 V adapter then run it again. All this in theory and not tested. I guess you can run up to 10, maybe 15 m whithout data loss or delay.
My plan is to buy 5 cheap USB webcams an modify the enclosures to make CCTV cameras with IR lights. Cost-effective and handy. Then run them from a PC with the method I described above. I won't push video signals more than 10 m.
I read up on 6-core alarm cables. It works nicely. I always buy a roll or two. Nice and thin, but not too thin, about the same as USB.