In 2018 I was looking for cheap Cad program, when I came across ProgeCad 2018 which I have been using till now. If you have used AutoCad the interface in ProgeCad with few differance's, Is the same. You can buy, ProgeCad for under £500 and with a Perpetual liceance, unlike AutoCad which you have to subcribe. If you what to design Concord than use AutoCad, for us that live in the real world use ProgeCad. By using my ProgeCad 2018 key I have now upgraded to ProgeCad 2024 for under £200 and still can use ProgeCad 2018, try it you have nothing to lose. Andy styx.