This is best advise one can get at any age, so easy to bypass and say it will never happen to you of needing emergency fund, but it can happen if you get layed off and then get ill, then what? Same as trading, even better have emergency fund of three years piled up.
Buying a home is in itself retirement funds, in 15 or 30 years, it might be doubled or tripled from capital appreciation and if you can buy on a five acreage tract, neighbors are not within hearing wife yell at husband to take out the trash. People who rent have nothing in 15/30 years. And what happens if at age 60, you need to be in assisted living or nursing home later, most people have so little savings when that time comes.
Rentals are best when you own them and accumulate them, let others pay them off while you only put down 15% to buy them.
I missed the second emergency fund after you have paid off all unsecured debt of 3 to 6 months expenditure.