Space travel has all but stalled, if not gone backwards in terms of where we ought to be in distance from the Earth, type space travel. Yes, we can recycle water - on Earth. Yes we can load a spacecraft with enough provisions for a long journey - theoretically. Yes we can can load a spacecraft with enough fuel for a long journey - theoretically.
These hurdles will take several decades to refine, if they ever do. These are not necessarily scientific issues but real, life-ending obstacles that are not going to be swatted away with tech. We simply don't have the means to transport life huge distances from the Earth.
We can barely put together a Moon fly-past.