We must be clear about this though, life support seems to be food only. The vessel should be easily able to create water from its fuel stocks, and the oxygen tanks can be refilled on a visit to a breathable atmosphere (Core Book p142).
That leaves Simon's sanitary products, but I don't believe personal hygiene products, laundry and surface cleaning products add much to that Cr2000 total.
Filters et al are part of routine annual maintenance. Same for replacing or redecorating stateroom features, annual maintenance.