I'm starting to think that the canonical reference was simply a bogus "this would be cool" decision without looking at the astrography.
Looking at the costs per jump, and ignoring the fixed rate as being J1 only...
Let's see... Potential direct runs.
J1: Yorbund (C7C6503-7)
J2: Kinorb (A663659-8), Dentus (C979500-A), Corfu (X895674-8 Red)
J3: Beck's World (D88349D-4), Pandrin (B260675-B), Ghisaersae (C758646-7), Ksunekso (B525575-A), Lablon (E646589-A), Keng (E2718CA-3)
J4: Shionthy (X000742-8 Red), Moughas (CA5A588-B), Enope (C411988-6), Ueghrrozue (A6A47BA-A Vargr), Roukhagzvaengo (E526899-7 Vargr), Rruthaekuksu (D231210-6)
Ruling out D or E ports and Red Zones, that changes to:
J1: Yorbund (C7C6503-7)
J2: Kinorb (A663659-8), Dentus (C979500-A),
J3: Pandrin (B260675-B), Ghisaersae (C758646-7), Ksunekso (B525575-A)
J4: Moughas (CA5A588-B), Enope (C411988-6), Ueghrrozue (A6A47BA-A Vargr)
Let's see... There is a very real possibility of Ueghrrozue having a J4 link It's 10's of millions, so could support a few dozen at a time. Maybe a singular J4 ship making regular runs... using a normal 2-week schedule, that means a 6 week and 2 day trip.
It also means 4 weeks dirtside on Heya... Using the "broken" MT rates, a soc 15 character spends just shy of KCr4/month...so... CrImp150 while down, plus around KCrImp60 or so for passage (using the numbers I generated from MGT's design and op costs)... vs the AA=0.5, of spending CrImp2813 for the same 6 weeks at home... and with CrImp 8K per annum per capita, that's average CrUegh1230/mo, for Soc 5 being the average... but likely not the median. (Median US income is well under the average...)
Doing some comparison... if a local world averages CrL500 in naval tax (TCS), and military spending averages 3%GDP , Army gets 40%, and Imperium gets 30%, (Striker) that means CrL500=0.03*0.4*GDP. GDPPC (Annual) is thus averaging 500/(0.03*0.4)=41667 per capita per year, or Cr3205 per month. Since the 40/40/30 LocalArmy/LocalNavy/Imperial split appears elsewhere (T4 IIRC), the CrLocal value appears elsewhere as well...
This implies the average person pays Cr1250 in military tax.
Now, on earth, modern, tax income averages about 34% GDP. Let's say 30% for simplicity. (Note, typical Earth is about 10% of tax receipts on the military,but ranging from 0 to 30%... and Tax receipts as % GDP runs up to about 50%) So the average person pays some CrL12,500 per annum of that CrL41667, leaving CrL29167 or so, dividing by 13 months, gives CrL2243. Easily enough to support average Soc 7 on lifestyle, which in MT includes clothing, food, housing, and incidentals... In fact, it can support Soc 9...
I think I figured out how DGP came up with that number... it's a car payment, plus TCS, plus real world Tax/GDP relationships as mirrored in Striker. Cr500 per month on a vehicle plus fuel and maintenance sounds about right, too. Half that's the mortgage on it; rest is fuel and maintenance. 5 year vehicle loan. There's your CrL250/Soc, Hans.