Mission 5 [suggested name, Pioneer Class expeditionsNavigaiter]
Develop Lunar Research Labs and Lunar Mining with strict controls. Create Lunarscape Law precedents to prevent spreading commercial blight to a new world.
Life support improvements as quickly as possible.
Micro-gardens for oxygen enrichment and research and enjoyment. Improve and add more hab tanks for crew and customer comfort.
Complete the station and offer highly profitable reservations to NASA, ESA, JAXA and other space agencies and to private individuals and organizations with big funding. Talk about a captive niche market!
Sell the honorary names of various infrastructures or LunarFeatures to the wealthy egomaniacs for big funds. But save the station name for an Apollo astronaut.
Better funding through tourism. Navigaiter