Immigration Department has updated the requirements for Subclass 191 Visa

There is no minimum income requirement for the Permanent Residence (Skilled Regional) visa (subclass 191).

Primary applicants must provide notices of assessment issued by the Australian Taxation Office (ATO) for three income years out of the five years of their eligible visa. Primary applicants who have already lodged should ensure their application provides these three notices.

https://immi.homeaffairs.gov.au/visas/getting-a-visa/visa-listing/skilled-regional-191/regional-provisional#bclid=IwAR2qYtPdaoZs8Vy87TWPYu8_XSe68T2GN4AS8v71JjgFkCKHV_urRXpUR3Y