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You can't whack them shifts! Are they 12hr shifts? Plenty of time for 'vanning it then I take it?
Most are 12 hrs, just a few 9 hrs. (5 days in, 3 days off, 6 days in, 5 days off, 3 days in, 6 days off) Not too bad for 'vanning, but have to work around SWMBO's job too.

That must be like working part time, got any Jobs?..........

Shifts can be blessing, can also be a pig. Mine are 10 hour shifts, 3 days on 3 days off. Works out at 15 days a month 
Slightly longer than normal day, so not too bad.
Sods law always family/friends/oof events going on at weekends when I'm shifted on, but having week days off is great, everyone else is at work! 
I've never done a rolling shift like that, but work with plenty who have. It seems to be a b4ll ache as it takes weeks before you get a complete week end off.
Some months I have hardly any weekend time off, others I do. It can be a downside, but the leave makes up for it.
Take 3 days off, i get the 3 either side off as well (not shift on)
So 3 days leave, becomes 9 when I am not if the office, 6 days booked off becomes 18, and so on! Rather big perk I never realised when taking the job.
Booking a month off here, is not unheard of!