You should not shop for a molding machine until you have an actual use for one.
If you know exactly what you will be molding, and what quantities you will be making, then choosing a molding machine properly sized for your need will be easier and more cost advantageous.
(worded another way, know what you are to mold, study how many molding cavities of the molded article are to be molded simultaneously to satisfy your customers demand, and then choose a molding machine properly sized to use the mold that satisfies that demand.)
For info on 'properly sizing', I suggest that after knowing what you are to mold, and how many you will be molding, that you then talk to molding machine salesmen to find a proper sized machine for your need.