soil recomendations will stretch from build a soil to make your own. many used to do the fox farm dance but seem to be dropping on quality. for bugs you need to impliment a complete ipm plan. Plant count will depend on limits, goals, strains, etc. If no plant count limit s.o.g. is the way to go from what i read as it limits veg time. If that is not an option 4 seems to be a common number. It is all relative, many moving parts to growing a health plant, time, goals, money available, space available, growing medium, etc