I don't want our passengers to be forgotten and buried in the forums, so I "push" this thread again.
I don't think Passenger Transport needs an own elite ranking. It would be fine with trading (when you see trading as economy).
Persistent NPCs would be really nice, but if they are not in from the beginning, it would be ok. Hauling passengers in passenger cabins would be a beginning. As already stated earlier, in my opinion it would be better to start it and finish it later, than not starting it at all!
Passenger Cabins shouldn't be available to all ships in the same quality (e.g. the best could be size 6 and only fit the bigger ships).
That would allow a Cobra to be used as a taxi, and an Orca to be used as a interstellar liner. I imagine a co-pilot's seat as the smallest cabin and a Condas or Clippers Panorama-Lounge the largest, in between there may be size 3,4 and 5 cabins,... I would prefer a slightly different system than originally intended.
e.g.
On small ships (size 2): only one person / guest
Compartment size 2: additional Life-Support for the Co-Pilots seat and locked controls (Taxi) (no ammo)
Compartment size 3: Either for a group of 5 passengers or one business class Cabin for two passengers with bed, shower, toilet and window. (1Cr. per LY upkeep, ammo)
Compartment size 4: Either 10 passengers simple and plain or 2 business class Cabins (10 Cr. / Ly upkeep, when used)
Compartment size 5: For either 20 passengers, four business class Cabins or two VIP Cabins (50 Cr. / Ly Upkeep when used)
Compartment size 6: The Luxury Cabin for up to 3 Guests in absolute Luxury, Whirlpool, Library, service personal,... Cannot be fitted to T7/T9
There could be random passengers as well as Power/Faction Clients. The ones associated with factions or powers could share their standings and offer missions based on the standing / reputation. Random missions would give some realism. There are not only Powers out there.
Mission types:
Weddings & funerals (intra-stellar, no jump)
One hour in Space (have a nerdy boy sit on co pilots seat and show him your work, something like rent a Ferrari for a weekend)
Travel A (Bring me/us to station XY)
Travel B (Bring me/us to station XY, pick me up and bring me back)
Travel C (e.g. show us 5 neutron stars and a red giant within 3 hours)
Business Travel A (Bring me/us and our Cargo to station XY)
Business Travel B (Deliver Documents and Pick up Mr./Mrs. XY at Starport XY and bring them home)
Business Travel C (Bring our delegation to XY and pick them up after the conference)
Criminal A (pick up our contact after the heist and bring him to outpost xy - there could be a cargo mission as well)
Criminal B (Our contact is stranded in fed space, bring him to the empire)
Criminal C (Contact is wanted for market manipulation on the last CG in XY. Meet our T9 at the "seeking weapons" point in xy and bring him to safety)
...
Mission alternatives:
Travel becomes criminal, additional cargo missions, escort or kill missions,...
Not all missions need to have a time-limit
...