The Sobon is a continuous process. This is Sanatan and Vedic. Recently discovered by Dr Rajatsubhra Mukhopadhyay(sridoctor). That is to be done by group or individual. This is like the prayers and homa. Sobon is more important than homa for our life and Sucess.
SOBON in the VEDA https://www.amazon.in/dp/B0871N2MB2/ref=cm_sw_r_apan_glt_8EXSSCQ7FQ6RPB1BKJGQSobon in the Veda