No. Think you're being unrealistic optimistic hoping to 'speed up' the feed process at 3wks, and establish a routine (WRT feeds).
That said, we did put DS1 (also BF) down at 7pm from about 3 weeks - in his moses basket upstairs in our room. We rocked him or shushed him and he was happy with that. He was very big at birth (10lb+), although he lost well over a pound in the first week, so he was probably only about 9lb at 3 weeks. However, this may still be bigger than your baby - generally if they are smaller they will require more frequent feeds as their tummy will be proportionately smaller and need to be refilled more quickly.
DS2 was also BF, weighed only 8lb at birth, dropping to 7lb in the first week, and then putting back on, so that he would have been around 8lb at this age. He was not having any of it WRT bedtimes, so he stayed in his basket downstairs for the first 6mths. (This was also partly because his big bro had a bed/bath routine that was going on at that time, and it made sense for his dad to get on with that and leave me on the sofa with DS2.) What I'm trying to say is that they are all different, but IMHE, they'll need feeding every 2-3 hours (from start of one feed, to start of next feed) at this stage, and you can expect them to take a good half hour at times. By about 3 months, they get really good at draining a breast in 5-10mns and you can deal with the nightfeeds much more easily as you're then both back to bed much more quickly.
If you can, go with the slow-time and zombie feeling - BFing is very difficult to establish, takes loads of time, and is relentless for you in these early months, but it will get easier. Try to get to bed as early as you can yourself, and expect any vestige of normality to be but a distant memory for a few months at least. Once you get to the 5wk mark, you could try expressing a bottle of BM for your DP to administer once a night - although be warned that early on it's hard to get out more than a few drops, and that not all BF babies will accept a bottle. One no more than once per 24 hours though is not supposed to cause any 'nipple confusion', and if you have time to sit and pump, it does offer you more flexibility later on (when you have more established milk, you can fill a bottle more easily, then have a few hours out in the evening/afternoon, knowing that whoever baby is with has some food that s/he will accept). Again, one of mine would accept a bottle, t'other wouldn't.
Good luck!