We own a house in CHCH NZ but are stuck in EQC battles and would like to purchase another house for our growing family and sell our current one once the EQC stuff is sorted.

My mum has offered to transfer us 500k to purchase a new house and we would pay her back instead of a bank. She would be transferring the money from Canada. Has anyone done something like this? Are there any tax implications or legal implications as she is transferring us the money, rather than us transferring it overseas from our own account?

The new house would be in our name etc.