Hope I have posted in the correct part

Im wanting to learn as much as possible before I even consider a Suggy, so bear with me.... wub
I have read that only certain types of cages can be used to house them in IE the way the bars are placed,Zinc free metal etc, what ones would you suggest?
Are they best kept in pairs?..I would prefer same sex if pairs are a imperative as I am not interested in breeding, so do males kept together fight or females?
I know after a lot of patience they develop a close bond with their human family, do they gravitate to one particular person and if so are they hostile towards the rest of the household?
I know they are nocturnal and once the bond has established does that mean no sleep for me if it is put in its cage during the night?
Is it a important for them to have constant heat sources? IE a hot rock or a ceramic heat bulb when in their cage?
and lastly (phewwwwww)
What is the recommended age to get a joey at? and have they a high mortality rate in captivity?
thanks all in advance xxx