I don't know whether something I said confused the OP or whether what they saw was from someone else.
I have 5 different income streams currently active:
1) rental house income.
2) rented farmland income.
3) social security income.
4) mortgage note income
5) stock/bond income.
Income sources 1-4 cover 96% of our budgeted annual spend.
Another rental property (or just paying off the mortgage when the mortgage note we hold is refinanced) and we won't need to draw from our stock/bond income at all. Current withdrawal rate would be near 0% at the moment if we stay on budget.
It's a nice security blanket not to have to sell very much (if any) stocks/bonds when the market is down.
It's not like I don't believe in the 4% SWR, I think it's a darn good plan if one uses a few extra safety cushions, particularly for a > 30 year retirement period.
I don't count the other forms of income (i.e., non stock/bond income) as part of the stash the 4% SWR applies to because, well, they don't.
A huge chunk of our super-duper safety margin was from an inheritance a year before our planned FIRE date. The rest, a sizeable portion of it, was because we have a mentally handicapped daughter and we want to be extra sure there's enough left for her.