Well I don't have those three wheelers but I do have something that close, a recumbrent trike made by Sun. Talk about a wonderful bike to ride! Easy on my tailbone too which had some nerve damage to it and riding a bike with a narrow or wide seat would just makes it hurt. The trike is not cheap. We bought about four years ago at $1200.00 for hubby's birthday but he lets me use it from time to time. I am hoping in due time, those Sun trikes will go down in price, maybe not, because I think the manufacturer is in California.
My hubby's mom lives out in the country. Has NO license or knows how to drive or too nervous to drive. I don't know what she will do when my FIL would pass away, he was the one that would take her to town 20 miles away for doctor's care, grocery and all that stuff. I did ask her what she will do when FIL pass away and she said, oh, I'll find someone like Nona to drive me into town. Well Nona is roughly an hour and half away and she does not have a lot of money herself and only visit twice a year. My husband certainly will NOT help her...that's another story, a toxic relationship between mother and son. We live about two hours from them.
I see more and more bicyclers out there in this town, however, more accidents as well because people driving in cars would "muscle" the bicyclers to get a rise out of them to cause an accident. Even city buses would nearly run you down. Had one that would literally touch my handbars on my trike. GRRRRRRRR!