Home method to extract and dye cell free DNA

hello everyone
i have a current research on using cfDNA as an economic efficient pretest for cancer and infections, it can detect cancer way early and help save lives and reduce the need for treatment, and it could be applied for developing countries.

i have found few methods but they require relatively expensive and hard-to-get materials, can you help me with any diy protocols and alternatives or ideas on the subject? (links or videos are very welcomed)

thank you