Welcome to a great forum Longhaul
It takes TIME to safely learn how to DRIVE a sidecar rig so if you make that decision, give yourself some time before you put both of your lives at risk
I had a brand new Yamaha XS1100 in 1981 and had the best sidecar available, the URAL professionally installed, got 5 minutes of instructions and then DROVE it home for 100 harrowing miles! I did quickly find a big parking lot to practice in before the Interstate drive home, which was surprisingly fun and uneventful
My wife loved riding in the thing and we traveled all over southern California's beautiful mountains and coastal areas for many years. The back trunk held a lot of stuff too.
Google a search for 'sidecar retailers' and find more info. I'm sure they will have one for your FJR which would be the perfect bike for a Hack.
In my experienced, biased but very HUMBLE opinion, stay away from URAL sidecar rigs as they are not reliable.
Sam