No need to play that way. This (seems to be) an older inventor/fabricator that has open machine time and, within its capacities, would like to make some money from it. That’s inline with what this site offers, although it should have been posted in a different section.
If it’s a scam, it’s one that’s rather specific and effort’s been put into, so unlikely.
Nicole, if Tim’s not a member here suggest that he sign up, then he can be guided as to where to post this offer.