For manufacturing purposes I think my advice would be to buy a quality, well supported, enclosed printer. $400 can buy you a fairly impressive printer that will print PLA quite well, but these printers often aren't calibrated up to snuff and suffer from hot end issues that you really just don't want to deal with on a production level.

The Formlabs Form 2 is a resin based printer that will give you quality unrivaled by FDM/FFM printers. It's not cheap, but those things can produce parts that cheap FDM printers can't. Period.

The FDM printer I would recommend would be an Ultimaker 2+. It's basically a Cartesian printer with all of the issues addressed that a RepRap would normally be plagued with.

If you want to go more "RepRap", I suggest looking into Wanhao. They are Arduino based and have pretty amazing support for their price point. They are compatible with all of the free slicers and many people have championed Wanhao's as their Go-To production printer.