The are hundreds of hobby guys that have built simple machines to start with and then built better machines once that see the short comings of the first build, just trying to move you past the first stage so you don't have to do it all over again
If you did spend $25,000 and made $60,000 from that $25,000 investment I think that would be a successful outcome, If a design requires you to do this then some of us do this to move forward, there is a Zone members that did do there own Extrusions for there CNC Router machine builds