Where can I find glass and plexiglass as a source for cheap? Also maybe aluminum sheets (I think like 1/4 ")
Garland Steel has some aluminum scrap that they sell by the pound but it is hit and miss what they have at any given time… They used to have a bunch of 1/4"but they decided to clean up so no guarantees. Usually, lots of good milling blocks but as I said, hit and miss.
If you are looking up .250" Aluminum, look for it under Plate if you can’t find it under sheet.