We see you prefer the tandem seating and the front track width has to be configured to 'original' width specs because of steering geometry & engine clearances.
I sometimes wonder why there are very few attempts & examples; of using a relatively intact FWD section mated to trailing rear wheel. Just offering alternative configuration that could be 'easier' and still offers the 'comfort' criteria. The Peugeot 20Cup basically keeps relatively intact the FWD engine/drivetrain of a Peugeot 207 and integrated it to a motorcycle trailing arm. The seating is tight side-by-side, but could be use an aero roof. Also see the next gen EV handling dynamics test (narrow two-wheeled rear track) - Peugeot EX1.
256 Fifth Gear - Peugeot 20 Cup - Car Videos on StreetFire
The VW GX3 used a VW Lupo for their engineering exercise.