Your emergency fund is usually recommended to be 3-6 months of expenses, not salary…though I guess for plenty of people, even at high salaries, that may be the same number, but then you’ll never have savings anyway. Really your emergency fund is for however much risk you can tolerate, like if you end up unemployed for 3-6 months, but your emergency fund is for things other than just unemployment, like sudden medical expenses or replacing a water heater. If you’re comfortable with a line of credit on your home being your emergency fund, go for it. There’s some risk to that, but there’s different kinds of risk to everything.