So I'm curious to know which way is better.So let's say I have $100k cash and I can either put 30% down on $100k duplexes, or buy 1 in cash and then BRRRR.

if I borrow 100k for a BRRRR (purchase plus rehab) and borrow the money for 9 months (purchase and 6 month seasoning before cash-out refi) he is totally fine with me giving him a lump sum after 9 months of $105,941. 

I ended up negotiating the price down using cash and got the property literally for 50% off the list price. 

If we Just rent one room out, it will cover our mortgage and utilities and still some cash flow. 

I live in Phx,az and recently friend of mine sold his bank (ex bank of america) literally as is and profiteed $300k  , he purchased it right out cash last year (I think) and it was in real bad shape in a shady part of town,  before him taking possession of the bank  homeless people where living inside it an using the bathroom anywhere in the building, he put maybe less than $5k in just cleaning it up and just a couple of days sold it.Basically the idea is to find super cheap homes in ****** conditions but the price is so cheap that you could still make profit by selling as is, investing as little as possible..

I was considering purchasing a single rental property with all cash to maximize cash flow. 

If it cash flows solid after detailed UW and it feels good, go for it.

The below terms are live as of this date, for a rate and term refi (no cash out).From left to right:Points: 1, 1.25, 2.Prepayment penalty: 10 years, 3 years, 5 years.Commentary/review, hopefully this thought process is useful when evaluating offered terms for a maturing commercial mortgage that needs to be refinanced. 

Cash flow has been super tough for the past 3-4 years since prices jumped during COVID.

I Don't have much cash to work with, so I'm trying to figure out my options.