There are several different rPods with alternative arrangements of the living area, but AFAIK all have the same wet bath module.
I suspect that your wife might find any of the molded fiberglass trailers even more cramped, and most small enough for your Tacoma will also have a wet bath (usually across the front, but in some cases an alternative to a closet) if they have the bath option at all.
I've been looking at these egg trailers, in addition to the rPod, and by comparison the rPod (slideout models particularly) is quite roomy for the weight. As it should be, at 18 to 20 feet, relatively large for a TT in the 3000 - 4000 pound weight class.
Camplite makes aluminum-framed (not laminated panel like rPod) TTs from 14 to 29 feet in length. They are relatively light for their size.
Model 21RBS has a rear bath that is relatively large for a TT of this size, a sofa slideout opens up floorspace (dinette an optional alternative) but it is still a one-room cabin. 24 feet long, 5000 pounds GVWR.
In the 16-foot box, bathroom is smaller but still a separate shower (no sink). 16DBS gets you queen bed and sofa in a slideout, but a much smaller kitchen. 19 1/2 feet in length, 5000 pounds GVWR. 16DB without the slide is about 200 pounds lighter empty but more cramped. 14-foot box retains the same small but dry bath, gives up some living space.
When Camplite gets down to the 13-foot box (16 1/2 foot length, single axle, 3000 GVWR) the bath comes a tiny box, shower over toilet, actually smaller than the bath module in the rPod.