If not, you must return to work to make up the difference between your rental income and inflation-driven prices.What determines rent growth?

@Ryan Williams - Leverage always increases your returns.

Cash invested: $40,000 Sale price: $205,000 Strategic Market Pivot: From Long-Term Rental to High-Yield Fix and FlipThis property was strategically transitioned from a single-family long-term rental (LTR) into a fix-and-flip project after analyzing market trends and identifying a pivot that would yield better long-term returns.

Also, your total returns go down without any leverage because you lose the multiplier effect of appreciation.Now, to answer your question.

You can certainly leave money in your BRRRR - it doesn't have to be the "perfect" BRRRR that so often is talked about where you pull all of your investment out and then some and therefore have infinite returns.

So that’s a 8000% tax free return.

I now monitor the owner's equity, return on investment, and other factors and then proactively reach out when they are ripe for selling, exchanging, or adding doors.

My suggestion is to build a spreadsheet and include the net cash flow to you for every month of the deal, then use the IRR function to figure out your return. 

Not crazy, but if that mortgage becomes $650K, $700K, $800K, you begin to feel a little apprehensive and need more interest in return for incrementally higher risk. 

Do not get stuck with sub par returns.