Add on potential electrical main panel upgrades to handle the increased load (assuming no gas service, they'll be cooking and heating with electricity in the ADU), along with drawing and permit fees and you're maybe another $5k. 

Quote from @Ashton Hines: Hi Devon, Curious what you think about the STR market around Lucas Oil.

Every current owner cooks their books- properties are never performing like their proforma says they do.

After you figure  it out, oil based killz does AMAZING things! 

Timber deeds are actual Deeds kind of like Oil and gas rights..

I agree with Robin, my first deal was a single family house in a good area with blue tarp over the roof and a noisy but working oil boiler.

Cook plenty and don't be so picky with your leftovers where you are free to microwave them for a quick on the go bite on the way to wherever you are going to get out of the house. 

One example for sure was that there were no exhausts over either of the stoves in the units and that was a big thing for me because I cook food on a daily basis.

"Ratatouille" said it best; yes anyone "can" cook, but only few will be great at it.     

A hedge fund owner who I worked for called it “a data revolution” and referred to data as being the new oil.