Now TRUTHFULLY, you get about 6 hours everyday during the week. You get more sleep on the weekends (if your platoon is good and don't get in ****). If your platoon screws up (it only takes one person... if one person screws up, everyone screwed up!), you could get inspections all night and a severe lack of sleep.
The last 4 weeks of basic are the hardest. That's when the sleep dep REALLY kicks in. As in... zero sleep... at all... maybe one hours for the whole of 5 days...
Good luck and best to you. Basic is hard and a pain in the a$$ but it's absolutely worth it. Even if you feel like the CF isn't for you, complete basic...