If you have a somewhat-above-average professional salary, saving at least half of your income is totally doable. I’ve been doing it for many years, even while I was the sole wage earner for a family of four living in high-cost California.
I generally recommend that frugal shoppers should avoid Costco, because Costco is exceptionally good at making people part with their hard-earned cash. But, there are exceptions to every rule. There are a few things you can do to hack Costco without a membership.
If you want financial freedom, you need to have a good grip on your monthly expenses. A lot of folks think they can control their food budget simply by shopping at the place with the best prices. That often means Costco or other warehouse clubs.