Hi. I don't know whether the vacuum idea is a good one or bad one so I won't try to encourage or discourage it. I do have lots of experience with a few brands of vacuum sealers and trust me when it comes to vacuum sealers you do get what you pay for (I'm referring to mechanical vacuum sealers and am not commenting on the OPs way of doing it since I don't know anything about that method, it certainly beats the price of what I'm about to suggest though). By the way I have not looked at the one mentioned above so I'm not making any judgement about that one. I've tried I think it's 4 brands of vacuum sealers over the past 20 years or so and 2 were cheapy brands, one medium price point brand and the brand I always come back to is on the high end of what I'd call medium priced ones.
I use my vacuum sealer on a weekly basis and the brand I feel very comfortable recommeding to all my friends and family is the Food Saver brand. They can be either bought online or also at Walmart and Kohl's. When I was rolling my own smokes I'd store the extra tobacco (I bought it in 1 lb bags to get cheaper pricing) and I used the Food Savers canning jar attachement to vacuum out the air from the 1 quart canning jars I stored my tobacco in and the tobacco would not go stale like if it was just kept in a zip lock type bag. They are very good whether you buy one of their basic models or one of their newer flashier models. The prices for them are anywhere from approximately $130 to $285 .
If anybody does get one be forewarned if you're using them for food storage (great for keeping meats from getting freezer burnt and freezing leftovers) do not be tempted to buy bags that are cheaper from other manufacturers. Some of them will work initially, but after a short time they lose the vacuum seal and your stuff loses it's protection. Their brand bags are more expensive, but you are better off paying a couple dollars extra and getting something that will work.
Sorry about the long rambling post. I just thought if anybody was considering buying a vacuum sealer maybe they could learn from some of my mistakes in the past. Happy
vaping!