Consider the case of someone wishing to live a luxury lifestyle in the trendy lower east side neighborhood of manhattan. We'll use a 1300 sqft 3 bedroom condo as a baseline.
https://www.redfin.com/NY/New-York/455-FDR-Dr-10002/unit-B30...
This condo will cost 8k/month with a 20% downpayment at todays interest rates, leaving our hypothetical million dollar a year salary person with 52k/month post-tax. Assuming they live a rather luxurious lifestyle of ~16k per month, they will still have a savings rate of 60%. Leading to a retirement in 12 years with a portfolio of 7.8 MM.
If the person makes 10x this value or 10MM per year... Then they can retire in 1 year. At 100 MM, they can retire in ~2 months.
You can play with the numbers a bit, our hypothetical 1MM/year individual would be living in the "average" 3-bedroom apartment for the Lower East Side. Perhaps the 10MM/year individual would choose the most expensive unit which is only ~4x more expensive, and increase their spending to 90000 per month - equivalent to a new model X per month.
They still retire in 3.8 years.
https://www.redfin.com/NY/New-York/105-Norfolk-St-10002/unit...