^^^ That. The "savings" you will get with cheap bags will end up costing more than they decent ones by the time you factor in your time trying to make them work or the food you will have to toss when the cheap bag fails. Also, make sure you don't be stingy with the bags.. I would often try to skimp and cut less than I actually needed, only to either run the food due to a bad seal or have to throw the damn bag I made out and start over.
IIRC I have the Foodsaver Deluxe that takes the hose attachment. It was around $120 when I got it, including the vacuum hose, mason jar sealer, and two bags. It has paid for itself several times over. Buy once, cry once.