When we got Elmo he came with an instruction manual from the breeder
on what and how much to feed him and at roughly what time. We also got a months worth of food too. She had aslo written down at what age to reduce his feeds to 3 time sa day and at what quantities. It really helped
I used to feed at 7.30 ,11.30 ,4 and 7.30 or thereabouts. Just remember after EVERY mealtime he will need to be taken out to the toilet and every time he wakes up also.
Is your mum going to be able to keep up the twice daily visits for the long term?