If you put around 200-300k into IBKR (not affiliated) you can get portfolio margin which will give you just shy of $2,000,000 in buying power. Access to leverage isn’t really an issue, but forced liquidation definitely is. The bank will not liquidate your mortgage if you end up underwater.
lesuorac|8 months ago
IIUC, Musk et al take loans at 25% of their share's value to avoid this ever coming up.
Also the average house price is 500k in the US so a 20% downpayment (which not everybody does) is still less than 200k.