|>>|| No. 26243
Been there, done that, lad.
Let me tell you right now - you can justify more sleep and more downtime, because you literally need it to continue functioning.
Burnout is a very real thing - corporations invest millions in ensuring their leaders do not burn out. You don't have that luxury. If - when - you hit the wall, your business is directly in jeopardy. You need to act now to preserve it.
You're asking for advice, which hopefully means you're willing to act on this - for the next seven days, you will get eight hours+ sleep a night. Try and take an hour a day to do basically nothing, too, though I appreciate you might not be able to do both. Just try it for one week. If you don't feel better, then you can try something else. But I suspect you'll find you're more effective than ever if you do this.
You need to sleep just as much as you need to eat or breathe. You're harming yourself by forgoing it. Just trust me on this one. I lost a good chunk of money and a good chunk of sanity doing the same thing you're doing. Something has to give - and if you carry on down this path, that something will be your revenue. It may mean you have to offload some busywork to someone else, or slowing your expansion down. I understand both of those things probably sound unthinkable to you, but it's what's needed. As I say, you need to act now, or you absolutely will burn out.