Most reputable journals will waive the fees in this case, though the easier route if you are in a rich country where this is less likely is to partner with an institution. They get to add to their research output stats and you get your funding, a win win.

For those looking for examples, see the clickspring youtube channel on the "Antikythera mechanism", he is a skilled watchmaker and he works with academics on actual reseach whilst building a replica, despite having no acadeic affiliation himself (at least that I know of, feel free to correct me if I am wrong).