What is the method to conduct Sudarshana puja at homes? Happened to know through a discourse that it is beneficial to have a Sudarshana Yantram at home. If so, what metal must it be made of? What is the prescribed method to consecrate the Yantram? What is the mantra to chant for Chakkarattazhvar? If Sudarshana Yantram is consecrated at home, are there any additional strictures that must be adhered to?

It is beneficial to have Sudarshana Yantram at home. The metal that it must be made of and the method for consecration might be learned through those who conduct Sudarshana homam and elders.
There are two or three mantra-s available to chant for Chakkarattazhvar which can be learned through Acharya.
Yes, if Sudarshana Yantram is consecrated at home, there are additional strictures that one must follow. When touching the Yantram one must have utmost devotion; one must not touch the Yantram when tainted.