Upkeep/PR (average of all non-scout ships for the race)(also exludes free upkeep mission ships)
Terran: 0.907023067
Miner: 0.7704956
Marauder: 0.242154
Guardian: 0.112477923
Collective: 0.33360975
Viral: 0.688532727
For viral I chose the most common ships:
Herc, Tyr, Nirv
Pyth, Angel, Bull
Lyth, Lictor, Chlor
Income Required for 100M PR
Terran: 90,702,306.7
Miner: 77,049,560
Marauder: 24,215,400
Guardian: 11,247,792.3
Collective: 33,360,975
Viral: 68,853,272.2
Net Income with 50k land and 100 Infra and 5k loyalty and food at 10. WITH cgs
Terran (com) = 2,562,500
Terran (agri) = 7,215,500
Miner (tax) = 16,460,000
Miner (Min) = 9,717,500
Miner (cgs) = 6,042,500
Marauder (plunder) = 467,833,333 (each turn for the 10 turns required to plunder 2 25k c2s)
Marauder (agri) = 3,227,250
Marauder (cgs) = 905,250
Guardian (agri) = 298,200 (2500 loyalty)
Guardian (tax) = 843,500 (2500 loyalty)
Collective (plunder) = 555,628,000 (each turn for the 10 turns required to plunder 2 25k c.3s)(yes I know those are big)
Collective (agri) = 7,312,500
Viral (tax) = 5,525,000
Viral (com) = 1,807,500
Viral (agri) = 3,097,200
Now. From these numbers we can calculate the highest PR each income type can go to in positive NET income (on average)(excluding plunder types, seeing as how they have no net income)
Terran (com) = 2,825,176
Terran (agri) = 7,955,144
Miner (tax) = 21,362,873
Miner (Min) = 12,612,012
Miner (cgs) = 7,842,354
Marauder (agri) = 13,327,262
Marauder (cgs) = 3,738,323
Guardian (agri) = 2,651,186
Guardian (tax) = 7,499,249
Collective (agri) = 21,919,323
Viral (tax) = 8,024,309
Viral (com) = 2,625,147
Viral (agri) = 4,498,261
THINGS TO CONSIDER:
-Keep in mind these are just raw numbers, obviously they will appear unbalanced
-Base PR`s for Tax
-Build rates (cheap ships that build fast will carry you a LOT farter on negative income)
-Colony counts (some races are simply better at holding more than 50k land)