Prefolds will definitely keep the cost down and they dry quickly which is very handy for a small person.
I don t think anyone has ever fallen in love with prefolds
I used exclusively on dd1 pad folded in a wrap. I used to nippa them on dd2 to avoid as much leakage on to the wrap.
I would go for more wraps if you re using prefolds as the prefolds won t catch much poo, the wrap will. So I d recommend a wrap with a gusset.
I use them now on Ds as I know they won t leak on me