Axle replacement

I found that I have torn CV boots, both front and rear. Changing the front axle looks pretty straight forward, I found some info here and there. Its also good to know that I shouldn’t have to touch the control arms. Now for the back I haven’t been able to find any info on that. What all is involved it that, any Diy’s floating around? Would 2hrs per axle be a realistic expectation? Also where are most getting their replacement axles from? I know a lot of questions.