It took them 2.5 hours to figure out the correct lockbox code so they wasted 3 hours of my time and my brother’s time as he had to drive to the unit twice to gain access to the property. 

Having an experienced agent on your team before the rehab i think is very important because it is during the rehab when they can help add the most value by pointing you in the direction of what adds value to the sale, what finishes to choose and what to avoid, even what color paints are a good choice, insuring that your target sales price is not just realistic, but that it can actually appraise for that amount. 

Here's my take on your list:5 - 100% correct. 

Ditto to everything above haha that is standard but unfortunate it wasn't set up correctly for you in the first place.

Good luck  You are correct that I do not yet have a ton of investing experience. 

Assuming i am correct, it does not apply to a garage being converted to an ADU.  

What @Alyssa Wright stated is correct.

If I was doing this first thing i would do is talk to the county office that control sanitary and see what they will allow. this of course assumes your zoned correctly etc.. 

Now that I wanted out of the contract their true colors came out and if the agent was unprofessional before he hit an all new low level.

Originally posted by @Tarik Turner:You are absolutely correct I misread that..