However, the BRRRR strategy (buy, rehab, rent, refinance, repeat) makes sense for a lot of investors, as value can be created through forced appreciation (renovations) and capital recycled through cash-out refinances.

So it is not continually cooling the same outside air, but rather, it takes the recently cooled indoor air and  recycles it through the return air vents and cools it again.

With say $20k in cash-out, and $65k held in escrow, you could recycle that $20k three times over by completing work, ordering a draw from your rehab loan, and receive those reimbursed funds for completed work in 3-5 business days.I walk through the whole BRRRR process with clients via purchase-rehab (or refi-rehab) loans, and then DSCR refinances once work is complete.

Fibr Carpet Recycling sells 35,000+ sqft truckloads of New and Repurposed Commercial Carpet tile at around .21 sqft with delivery included.

Recycling money from properties to use for the next one is generally a strategy for BRRRR more than for house hacking. 

Most HVAC systems will have a 5-year parts warranty; you need to register it to get 10 yr.Water/Sewer/Trash/Recycling is usually under the same bill through the City.

Also, you’re recycling this loan, putting your name on it instead of the sellers.

You might be able to milk the channel why you can but I wouldn't rely on it as a long term strategy. 

Steel-  US primarily does recycled steel, China does all of the virgin Steel.  

Three properties for $170K sounds like a bargain, especially if you can force appreciation after a turnover.If the property is breaking even with the initial purchase, I would pull the trigger on this deal with plans to BRRRR (Buy, Rehab, Rent, Refinance, Repeat) the properties as each one turns over to recycle my cash if the numbers work out.