Wanted: Looking for A small hypoallergenic puppy

I have a maltipoo puppy and hes getting very lonely im looking for a companion for him either gender work but preferably a girl. Also i already have all the supplies id need and cash for vets and things but thats why im looking for very cheap puppy. its also for my daughter who has severe depression she’ll probably be the one picking him or her up and taking primary responsibility. we dont want pure white though. the picture is our current dog. also 600 is the most we can go