Change to Maintenance Facility Cost
Because of the changes to maintenance in C#, maintenance facilities have become much more important for two reasons:
1) You can no longer use the same maintenance facilities to support multiple ships, so you need far more maintenance facilities in general. For example, if you build a 20,000 ton ship, you also need 20,000 tons of extra maintenance facility capacity to support it.
2) The only source of maintenance supply points is from maintenance facilities as you can no longer build them with construction factories.
Because of the above, the cost of maintenance facilities has been reduced to 60 BP. They remain the same in other aspects, such as transport size, manning requirements, target size, etc.
Note: In general I am very happy with the maintenance changes. They allow you to setup distant bases capable of handling larger ships much more easily and, together with the new shipyard worker requirements and the need for more financial centres, they are putting much more pressure on the number of available workers.