Thank you for the kind words on Olive, she is a stunner. Great thing about longis is that most of them will get highly contrasted: it will be neat to see if she continues to get more cream and black or may turn a darker brown and black or may surprise me and turn into something unexpected.
Longis in general take a long time to grow to their full adult sizes: females can average from my research ~6-7' so I would expect your male in the 4-5' average range. I would consider them smaller than BCC localities and Colombian BCIs but they are a bit more slender bodied as well.
She was started on a 7-10 day schedule on mice: she was very shy and actually took over a month to get started. This can happen with any snake though due to stress factors but I have not seen slow-starting as a common occurrence with BCLs. She is still small currently (being grown slow and she's just a slow grower anyway) but she's still on the same feeding frequency but now on rats. I like feeding my boas mice until their 1st birthday. When she's full grown she'll be on a 2-3 week schedule like my other boas.
All my boas are kept and prefer being cooler than my pythons so I can't determine if she like it cooler than my Argies, Colombians, CAs, Hog, or Surinam as all the boas are at cooler temps. If yours will be in a rack or shelving type set up you can house him on the lower levels.