Impulse Sealer

Hi
I am attempting to make some home made MRE’s for long-term preparedness storage.
They will consist mainly of dried goods (pre-flavoured rice / pasta / noodles etc) plus some candy bars, tea, coffee etc.
Assuming that the shortest lifespan (sell-by date) is on the candy bar – lets say 1.5 years – how much could that lifespan be increaced if all the food is sealed into a single bag using a vacuum sealer machine? and stored at the following temps:
room temp
refrigerated
frozen
thanks in advance

horde leveling guide

My bf and I are moving across the country (2,600miles) and we are only taking one car and a top carrier for it. I would like to vacuum seal all of our clothes, blankets, towels, etc.
Is there a good way to make my own vacuum seal bags, maybe out of big garbage bags?
Has anyone ever done this, or used the already made ones to get more room in your car?