First, on a Tacoma, you will be severely weight restricted. That may make your decision for you. I don’t know the numbers, but I suspect even a shell with the battery(ies), solar panel, water and passengers will be well above the GVWR. You might look into that first.
We have a Raven shell, and are strategizing a full build out as we speak. We bought the super short bed Silverado and Raven as a used package when we tippy-toed into the camper world. The desire to replace it has more to do with size than anything.
Eating indoors is an issue as others have mentioned, but we don’t like each other’s company anyway.
Ours came only with a propane heater and car charging only (no solar). We put in a panel on a piano hinge at the front of the camper that joins the two side boxes. When it’s down, it has a custom made cushion that matches the other cloth that puts it level with the side boxes. It makes a nice seat with storage under. We put a tri-fold mattress on top for sleeping. When we want more space we put the mattress and cushion up on the bed and flip it up. We also put a two bin storage area in the back corner opposite the heater. We put in a counter with a sink that drains outside and use a cooler for water. It’s mainly for light duty dish washing (similar set up to a Scout). We use a Iwatani butane grill that lives in the storage area above the heater. We’re adding an IOTA charger to incorporate shore power to maintain the battery better. Lastly, Thetford port-a-potty. If we weren’t bumping up, and occasionally above GVWR, we could continue to cobble the shell to our satisfaction.
We want a non-front (either side or back) face to face dinette, cassette toilette, outside shower, no gray tank and solar. We don’t want the height of a traditional flatbed, so the FWC Grandby is out. You can only get a cassette with a front dinette on a slide in or move to flatbed. I step on my wife getting out of bed to pee at night; she won’t sleep up top because I toss too much and occasionally snore.
We’re most likely looking at a Hallmark K2 on a Ford one-ton gasser, with a Sherptek deck.
There’s no perfect configuration. Good luck!