Steward
Rank	Upgrade Time	Upgrade Cost	Maintenance
1	0	0	41,500
2	?	152,500	76,250
3	?	222,000	111,000
4	?	291,500	145,750
5	?	361,000	180,500
6	?	430,500	215,250
7	?	500,000	250,000