Your budget will determine what sort of funeral you choose. Because you want to ‘do them proud’ you can very easily overspend. Remember that, ultimately, a good send-off is determined by what you say and do, not what you spend.
Ask your friend to help you stick to your budget and think about how people can play their part in the preparations and ceremony. Remember that many funeral directors will ask for all of the 3rd-party fees up front (this could up to £800 for cremation in some parts of the country, even more for burial), with the balance to be paid soon after the funeral, so you will need to have the funds available.
It’s perfectly okay to ask friends and family to help with the cost, and much more practical than buying flowers which will usually only be seen briefly. Finally, be sure to claim any benefits you might be entitled to.