New windows, kitchen, basement bath and adding a storage room/pantry in the basement. 

I am working on my first BRRR, and am close to finishing up the rehab.  

Are all the AC units new/er or are they all on their last leg. 

I have to check on codes/laws/regulation, but I know CA is on a high of making thinks convenient to build those at the moment.

Here's a https://www.irs.gov/businesses/cost-segregation-audit-technique-guide-chapter-4-principal-elements-of-a-quality-cost-segregation-study-and-report to the IRS website noting specific items that are included in the cost segregation study report.

You are much more equipped to create a win win for you and the seller. 

I don't know if this is for you, but my husband and I have mentored quite a few investors in Canada and helped them purchase their own multifamily. 

If you're wanting to use leverage to buy more properties, then once your credit is around 680+, one strategy would be to cashout refi your current property at around 50% LTV.

The area seemed to really gain appreciation in the middle of rehab and boosted an ROI that was already projected to be strong.

I invested in a Triplex in Blythe in February, with good cashflow.