The people who can just climb on highracers and ride them competently right away, make so much noise about it that it gets overlooked that they are actually a challenge for most people. But good luck fitting a Tour Easy LWB in your bike locker. Recumbent trikes are VERY popular, compared to any kind of two wheel recumbent for exactly the bruises you stated. With a good U-Lock I don't worry about leaving a tandem outside a Fred Meyer's for the time it takes to shop for a weeks groceries. I would not also worry at an active office park. Would I leave
Saki, or
Big Red unattended with a $150 U-lock for longer than it takes to say, "I'm back!"? No, I don't think so. YMMV. Don't know exactly what 'physical issues' are at issue, but, just saying, for a similar cash outlay to buying a decent used recumbent, a growing number of people are buying e-bikes or getting e-assist systems for their regular bikes. For back issues we are using Planks. A 4:00 min Plank will sort out ANY back problem that is not caused by an actual injury. FWIW.