@nergal if you could achieve a nonprofit status like a US 501.3c or whatever the equivalent in your country, you can be donated to by persons of means or companies with whatever tax benefits that gives them. Even if not, if you show that your goal is to heal some class of persons, then even without tax benefit some will be sympathetic to the cause and donate and help. Companies regularly upgrade hardware that is still quite viable and useful, poerhaps needing new batteries or other minor work. Decide what you really want and you can do it.