That's what I was thinking and I could build up a mylar before sealing it. I haven't started buying bulk yet and I could do single meal servings or only what I would normally use in a specific time. Do you have an idea of how long the food saver bags last before they start letting in oxygen?
I keep my extra oxygen absorbers in food saver bags and I haven't noticed any air leeching in for the past year. Mylar and food savers together are a redundancy. If one system fails, the other is still intact. It is not a bad idea at all.
Here is a link on Amazon for 10 bags and 10 oxygen absorbers for $27. They are the 5 gallon size bags. It also includes free shipping. Don't forget to put the rest of your Oxygen absorbers in a food saver after you open the packet.
I would depend it all on whether or not the food you are storing is a fast perishable or not. If you use a Food-saver, then Mylar it inside or a bucket or something of the sort it should keep for years and years to come. I am still kind of new to this, but I have been doing tons of research on the matter. Goodluck I wish you the very best.