This was me 5 weeks ago. DS wouldn't latch due to a combination of problems so we fed colostrum through a syringe then cup fed/ continued to syringe as top up. After about 10 days we moved to giving the expressed milk through a bottle when he needed larger quantities. He is now breastfeeding pretty well (possible TT/nipple soreness aside) and gaining weight brilliantly. It does get easier! That first week was miserable though, I feel for your friend.
My advice would be:
Always offer the breast first then use the cup/bottle as a top up so he gets used to it.
Consider a bottle. I was worried about nipple confusion but it hasn't been a problem. We found with a cup most of it was just poured down him - such a waste after all that pumping! Bottle also much quicker leaving more time for sleep/pumping.
Wake the baby to feed every 3 - 4 hours. 8 hours is too long at that age. If he asks for food more frequently then definitely give it, but this should be the longest you let him go for.
Be prepared for lots of contradictory advice from midwives eg over how much to give, how often to feed etc. some tried to force formula. I found this very upsetting. Don't do anything that doesn't feel right (eg I hated moving to a 4 hourly schedule on day 10, and the advice not to let baby cry when trying to latch and just give up and give the bottle if he did as it was wasting calories was ridiculous - but I felt I should follow advice)
To increase what you are pumping make sure you are drinking enough and compress the breast pressing all over as you do it. Swap sides when it slows down then come back to that side afterwards for more. Look at the kellymom website for advice.
Get someone else to do the cup/bottle feeding. At day 5 I was feeding every two hours, taking half an hour to breastfeed, half an hour to pump while DH cup fed, half an hour to wind/ hold upright and change. If I was doing the cup feed as well that would have meant 0 sleep. As it was 15-30m sleep every two hours round the clock was bad enough and I was quite delirious.
I agree with bees - limit visitors so she can just focus on feeding. Spend all day in bed in easy access pjs. Lots of skin to skin time and cuddles. Don't try to do anything else other than sleep, feed, eat and drink at first.