I would recommend a Bernina because they all have metal parts and no plastic parts. However, their lowest price will probably not fit in your budget. Whatever machine you buy, may sure they offer you classes. (They should be free.)
It is a lot better than trying to figure out things by yourself. Many times the instructors will also have tips that they have learned along the way. Sometimes price is not always the best bargain when you are not happy with a machine.