I mean it'd be awesome to have many, but not realistic in any real sense.
But I 100% agree w/ the cost overruns being a massive problem.
I much rather have reusable rockets than having ISS.
I much rather have in-orbit construction infrastructure than having either hubble or JWST.
I much rather have remote repair and maintenance satellites/crafts than having a robot rover on Mars.
If you keep doing what you barely can do, you'll keep doing it for the highest price possible. Instead you can invest in the infrastructure, and do things as they get cheaper with your current infrastructure.