Going by the specs (and I have no idea regarding that particular pump), it says it pulls 20" Mercury. To outgas silicone or resin, you're going to need a full 29" pull. It starts to outgas around 27 or so but doesn't really get going until the full struggling vacuum of 29.
As I understand it, a vacuum pump (at least mine) needs an oil reservoir to achieve vacuum. And you need to maintain the oil's integrity from moisture so a sight glass is usually incorporated.
As far as a chamber, you can use an existing vessel, but it's got to be sturdy, not just a bucket. More like a heavy stock pot or pressure pot tank. Anything even remotely thin walled will collapse. Remember, water 'boils' at room temperature under vacuum, you're talking about significant forces. You acrylic cover needs to be thick, not a sheet you'd get at Home Depot. I use a quarter of an inch thick Plexi plate with an aluminum frame and a neopreme gasket.
If you want to test the pump, grab a vacuum gauge (you'll need one anyway) and hook it up. If it pulls 29", you're in. If not, you may still be able to use it with a vacu forming setup.