Train Stations

I have access to all stations available, but I have only three trains, so just one medium railway station with four waiting  slots is sufficient for my recent needs. It enables me to make about 1000 train coins/day  if I despatch all three trains 10x/day. Another month loading passenger to get only 20 or 15 coins would drive me crazy.  I do not care that two of my regions ask for trains. It is like real life - one cannot have every wish fulfilled.