Is it possible to bootstrap this process by capturing low mass asteroids crossing near LEO? A small tug device paired with a separate crude ore processing uni

Is it possible to bootstrap this process by capturing low mass asteroids crossing near LEO? A small tug device paired with a separate crude ore processing unit with 3-D printing capabilities seems like a minimum viable unit. A few of these units in orbit, a few at LaGrange points, and we'll start leveraging the amount of re-usable construction material under human control in near space. It might also be a way to clean up 50+ years of exploration debris. Instead of de-orbiting a satellite when its productive life has ended we could just melt down, salvage, and repurpose much of the material. Literal pie-in-the-sky, but that's what it would take.