RAT5,
That is a completely different scenario. That's not commuting at all.
Having said that, is this common practice in Ryanair? A friend of mine was moved to a different base only once in five years. Still not ideal, but, well, he knew who he was working for!
It is common practice in Ryanair. Some see half their month being out of base particular times of the year. They're expected to get there on their off days, travelling in uniform without tickets, paying no airport duty, no duty time and minimum rest period.