staff travel is useless and risky on standby
Rule no. 1 in (low cost) aviation, to have some kind of normal life avoid commuting! If impossible look for other options, part time, long haul...
Anyway, decision to join or not under the offered T&Cīs is very personal, depends on current employment/social/financial situation and ambition. Some prefer to make more money and stay SFO and/or are 15 days per month from home, some prefer to be at home every night but earn less money... No good or bad decision here, just do whats good for you.
But indeed, you must be fully aware of the conditions before accepting the contract. So conclusion regarding post of askell. Best south european base of ezy is without doubt in Italy or France. LIS and BCN are completely different, but conditions are still better than local competitors, you might have difficulties to move to other base and avoid commuting.
And last but not least, donīt worry about car park in BCN, you can use your scooter/motorbike 95% of the year
