Vine, depending on your bb's personality and feeding habits, if you wanna TBF then its v likely that u will have to wake v often at night, up to every hourly at the beginning. My DD was the sort who had to be BF every hour or even 45min around the clock. And if you were to supplement, have to take the risk of supply dropping lor. Thats why I really *cannot* substain more than several months of bf lol. Then again, there are bbs who actually drink alot at one sitting, and can last alot longer (2-3 hrs), so depends on yr bb. If you TBF then gotta feed on demand, plus cant control the amout yr bb drink (you also wont be able to tell if she drinks directly via latching).
But then some mummies can take the frequent waking cause they fall asleep eaily, so daytime when bb sleeps, they can nap too. But personally I'm not the lucky sort who can fall alseep easily after waking, esp in the daytime no matter how tired I am.