Ox-Bikes, Revisited

I've had some time to mull over the ox-bike dream I've had, and I've managed to whittle it down a fair clip from that magical, mystical tiny house hauling machine I wanted to something more practical and practicable in our current whatever this is.
Let's have a brief trip together on where I'm going with this idea, shall we?

e-moped

While I do adore the idea of being able to make use of my home city's mixed use paths, I'm leaning more toward the idea of a dual hub motored electric moped for power. 250 to 500 watts per hub would be goal for the drivetrain. While pedaling something like this on dead batteries would be downright onerous because of the weight of vehicle and cyclist combined (I'm estimating ~120 pounds of bike alone), I would prefer to use a pedal assist system which encourages me to work my legs at least some while I'm pulling a trailer for cargo behind me. Once you reach a certain speed, ostensibly, you could let the battery powered motors take over. Ideally, the vehicle would be limited to about 35 miles per hour, top speed, making it a low speed electric vehicle.

Cargo Trailer

Gone is the tiny home on wheels following me from town to town.
I would like to be able to pull at least a few hundred pounds of cargo with me, however, be it groceries from a store that I might be out to deliver or tools of a trade I might pick up as I leave. For that, a trailer becomes beneficial, particularly one that I can lock up to secure my (or a client's) belongings.
I won't become the next Instacart, but who knows?
In addition, being able to haul even a basic push mower, weed eater, hedge trimmer, and a blower to very small residential jobs would let someone who wants to start a tiny, one person landscaping business do so with a smaller investment, as an idea for something of its size.

On the trailer, I'm considering solar panels, which would allow me to charge any electric tools or otherwise supply my own power on a job site if I'm using the trailer in that manner. This would ideally be coupled with some of the battery storage being on the trailer -- I may have days where it's just me and the bike, then days where the trailer is my plus-one.

rEcharging and Charging

Unlike ebikes and many escooters in America which use a pitiful 120 volt AC charger that converts to DC and takes 4-5 hours to give you 20 miles of range, I want to have enough onboard power storage for 60-80 miles of range, and be able to use the chargers I find outside stores (CCS, J1772, etc) to charge on the move. This means finding a way to connect those bigger chargers to feed my needs without blowing up the bike's circuitry. In this era of internet connectivity, I figure there are schematics and/or parts that can effectively drop into place to allow me to charge the vehicle quickly. If I can get 15 miles of range in 30-60 minutes of charging, that's great! If I get more? Fantastic!

Wishful Thinking

I realize the idea of an electric moped with a cargo trailer for a few hundred pounds of cargo is likely just wishful thinking. In America, we just... diesel truck our way around everything, and roll coal on everyone who's driving on batteries only, but I hope one day to win my freedom and make my way to somewhere where the ideas and ideal of right-sized transportation isn't drowned out by the whistling of a turbo diesel truck.

Someday, Earth. Someday.