If you're looking for cheap weights, bars, or maybe even the occaisional power rack - then check Craigslist or Backpage.

There's a lot of people trying to sell their old workout equipment. Some of it still in near-mint condition.

Just make sure everything is standard.

Also, as far as power-racks and benches go, you can also build one yourself out of wood. Look online and you'll find many people have done this. It only takes a knowledge of geometry/physics and construction (and a trip to your local home construction store).

Voila! Your end result can quite easily be as safe as a standard metal version.