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

In my Chart of Accounts we list each account separately and then each one is easily listed on my P&L.

We distributed profits to investors quarterly and returned a 45% IRR to investors annually.

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. 

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.

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.

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.

Then don't rehab for zero COC return.But if you can spend $3000 on the lite rehab and increase rent from $1000 to $1050 then you'd gain $50 per month.50 x 12 = $600 more annually because you rehabbed.600 / 3000 = .2 or a 20% cash on cash return! 

You need to make sure that your property is easily financeable if you decide to sell it in the future and any future buyer can call out non-permitted items and actually report you to the building department or, at a minimum, ask for seller concessions.