You need to get around an adult Blood. My big girl is over 5.5 ft and around 30 lbs. She is a handful. They are very thick and very powerful. Seek out some older adults so you can see what you will be getting in to. I don't say any of this to discourage you. I just want you to be informed. My big girl is a puppy in your lap but when she and I don't agree on what she needs to do she is nothing like my little weak ball who doesn't ever give me any issues. Bloods have more personality it seems and are very vocal with their huffing and puffing mixed with plenty of hissing.
I also keep my big girl in a 4ft x 2ft x 15 inch pvc cages. My younger three are still in a rack system but one day they will need to upgrade.