[alasyr]

1. yes

2. yes, you can RM with 3 sattelites (1 with miner, 1 with farmer and one with extractor)

3. If you take relgious techs you probaly slow down min. concentration dropping by 3 ponts a year wth Nature Shrine III (improves planet value 3% a year, year being 10 turns)

I think that best remote miners are bases (half the maintenance)