Sounds crazy, but I've been doing this so long I've gotten really efficient at working with just a 13" laptop.
I move around my house, so I don't have a desk (though considering getting one). Kitchen island, or dinner table, or living room sofa/chair. I also have monitors on my exercise bike and treadmill for those long conference calls.
Sometimes I miss not having multiple monitors, but it's fairly rare. Money better spent on gadgets that let me maintain the illusion of being couped-up in a home office - premium ear buds, watch with 5g service, etc..
In the market for a larger place where I'd have space for a dedicated home office. I've used a standing desk - found it surprisingly uncomfortable with dress shoes (so more for at-home than actually at the office). But IMO you're better off figuring out how to inject some exercise into your daily work-from-home routine. Whether that's an under-the-desk treadmill, or a recumbent bike or many other options....Dual-purpose yourself a treadmill that you can use as a standing desk, or maybe a slow walk for a long conference call or something like that.
And by "dual purpose" I mean you can get adjustable laptop stands to sit on top of your treadmill. So that's basically a standing desk, when you want, but also a fully functional treadmill for working out or other.