I have lots and lots of suggestions for a multi-material 3D printer and here are some of the best options:
• WanhaoI3 Fully Assembled Version V2.13D Printer
• AlfawiseU20 3D Printer Kit With Touch Screen
• WeistekIdeawerk - Portable 3D Printer
• MicromakeL2 UV SLA DLP Resin 3D Printer
• HEPHESTOS 3D Printer
• Wanhao Duplicator 9 MARK I
• Wanhao Duplicator 6 - Metal Frame 3D Printer
• Wiiboox3D PRINTER
• Deegreen Office And Home 3D Printer
You can check the specification of all these 3D printers on ‘3D Printers Online Store’ and buy the most suitable one for you.