I agree, a Venturi would be a no go. I've done alot of degassing of silicone polymers which had a similar viscosity to most epoxies. I would typically run at ~100-200 torr absolute. Any higher vacuum and the silcone would just blow up out of container because a small bubble becomes a really BIG bubble before it pops.
Check out coleparmer.com. They have some pretty affordable vacuum pumps. I also strongly reccomend you get a vacuum dessicator for about $65. It hold a vacuum well and has a shutoff valve too. You can pump down to degass, and then just leave it alone while the bubbles rise and pop. With this setup, You might even be able to get away with a strong vacuum cleaner or shop vac depending on the epoxy's viscosity.
Speaking of silicone polymers, you might want to also check out Dow's Sylgard series. They are designed for electronic encapsulation and are capable of being reworked if nescesary. Lots of different formulas for different properties, dielectric strength, K value, mechanical, etc... I have also found a direct to consumer source for the products, but unfortunately I cant remeber where off the top of my head.
-Chris