I had a R.E. business. Pretty basic in term of flipping for profit. But while I made a lot of money in some years, I equally lost a lot during others. I never had a moment of free time, I was always working on something, between the pilot gig, raising two kids, time for my wife, and working on almost endless R.E. projects. Frankly, I was burning the candle at both ends and all for what? A few extra bucks? Meanwhile, my buddies were always living unencumbered. If they weren't sitting around at home relaxing, they were traveling and enjoying more than a day at an foreign locale (far better travel experience than a pilot).
So I gave it all up and have ZERO regrets since. Like many on here have stated, you're better off just picking up a trip/ turn. Then again, that extra flying will burn you out as well. Life is a balance. The reason the FAA limits the hours we fly is so that we can properly recuperate. IOW, you can only work so much in your time off.
Most business-owners put in 80+ hr weeks in the first 5 years to make it all pay off. That's a tough thing to pull off as a pilot. I'm not saying it can't be done. I did it. But I nearly killed myself trying doing it all. I think I read a story once where it said 90% of all businesses fail in the first 2 years, and of that remaining 10%, 90% will fail in the following 5 years. Not sure whether that is true or now.
The basic premise of running a business for profit is pretty straight-forward. What a lot of people fail to take into account is that once you're a business, everyone has their hand out... practically EXPECTING a handout. From employees, to consultants, to contractors, to government bureaucrats, to insurance companies, to banks, to customers. Your job is to funnel all that into an something that is a cost-plus business model. Which works, most of the time, but when governments or insurance companies change the rules of the game overnight, sometimes it's difficult to pass on those costs to a fickle consumer.
I have a huge respect for entrepreneurs for all they have to go through.