What are your dimensions on that 75? It would work for a long time, and possibly for life but some Bloods get HUGE dude. 5-6 feet may not sound like much but their girth is quite impressive so they do make a large coil on the bottom of the cage as adults. They don't need the height and they aren't active but you still may want more floorspace for an adult. I'm not sure what standard dimensions are for a 75, so I'm just basing this on what I know about Blood Pythons, and I've seen some BIG ones LOL. Imagine a 6 foot snake as big around as your thigh or even bigger depending on your size. Having said that Bloods are cheap (way under your proposed budget) and that cage would definitely work for a long time, just want you to know what your in for. Also they can be quite nasty when young but mine tamed right down after about a week of handling for about 20 minutes a day. Would still hiss when you went to pick it up but it was 'all bark and no bite' after that LOL.