This is because it is more risk to the institution to loan on a rental property of bigger size than it is SFR, and an even bigger risk to loan on a property with multiple units.

The size of the refi loan that you would be able to get would depend on the current appraisal on the house, your income and your debt-to-income ratio.

What size house can you build on that lot?

I'd be so embarrassed for my client to see listing if the pictures were blurry, wrong size, and/or upside down.

Bedrooms that can handle at least a Queen size bed or even a King. 

I wouldn't waste my time with the Wells Fargo or Bank of America size institutions. 

I have a decent sized start-up capital of 50k and will soon have a real estate license in az.

Population Size - Greater than 1 million.

The numbers worked and after a lot of internal debate, I had to logic myself into a decision: If I bought these 2, I was going to eventually refi and use that money to buy more SFHs anyway BUT the price on these 6 as a package was way better than I'd get in another year on an individual SFH.I was getting a Costco-sized discount for buying in bulk and instead of shying away from the chance, I pooled together the money from friends, family, a HELOC, etc. and went for it.

I'd also look into what kinds of development fees will be levied against your project by the authority having jurisdiction -- ADUs under a certain size can avoid some of these fees.The CalHFA $40k ADU grant program could also help cover some of the pre-development costs for an ADU.