I LOVE this idea.
Someone early on mentioned the concern of "not enough material/pages to justify the cost" of producing a separate volume. I would like to point out that Nobles have their own book now... "Dilettante" and it is full of useful items.
And to the powers that be... if there is a problem with over stretching Scholar material, you can always combine Citizen and Scholar together... kinda like Civilian and Military Vehicles...
One of the things I would LOVE to see, something I had to wing/"house rule" is more specific information on Laboratories and Medical Bays.
Pleas, please, please Mongoose people... please design more than just 1 size of a med bay!
Here is what I do...
Auto-Doc takes up 1 ton of "floor space"... the device isn't a full 5'x10' (1.5m x 3m) but it does take up the bulk of that floor space with enough room to walk around it, get in, program it, service it if needed.. things like that. Currently people with auto-docs just "have them somewhere on the ship"... stuck in the corner of the common galley I suppose.
1/2 ton to 1 ton = aid station... recessed alcove/closet with wall mounted medical devices/scanners, with fold-out cots, cabinets, storage, and disposal units. larger station can handle more people...
2 tons = med/exam bay, large enough for 1 bed/exam table and a desk for a doctor with storage cabs. Think of the size of a room everyone goes to when they see their own doctor... just a high tech version of that.
3 tons allows 2 beds with doctor station between (or 1 bed separated by an auto-doc on the other)
These first two sizes can treat serious wounds, infections, "the flu" and allow for minor surgery, but complex stuff like open heart surgery, cybernetic implants, viral/contamination rooms, etc... will of course require larger rooms.
For cost in my house-rule examples from above, I just extrapolate the costs from cannon.
The larger you go the more advanced/difficult surgeries you can do, but that should not remove a basic med bay from a typical tramp.
Obviously on smaller freighters you don't need a surgery center, but without a small med-bay anyone with medic skill has to "remove the bullets" on the kitchen table! lol... so who cleans up the blood so the other paying customers won't get messy walking through the common room?
I would also like to see perhaps something on specialized airlocks. Do "typical" airlocks allow for absolute sterilization, or just "typical" things. When you see and movie or show on TV with scientist going into a lab or hospital to work on an extreme case, they always go through a very complex and thorough decontamination chamber... read any Micheal Crichton book on high tech / lab environments for inspiration.
Along with specialized equipment and components Travellers can incorporate into their smaller tramp freighters, a more thorough and wide ranging set of careers would be great, as many others have covered in earlier replies.
A handful of new scientific/medical ship designs would also be nice. Not every lab ship in known space is a spinning doughnut I hope.
And I love the idea of medical school prior to entering an "working life", similar the way High Guard treats the Naval Academy.
Just my 2 credits.