The reason that I did not think it was for me is it did not have a function for estimations. 

I also believe there is a small co-op in La Jolla but only infrequent sales so not good for estimating a discount.

Additionally, they should be helping with taking video walkthroughs of the location and the property, estimating renovations/scope of work, helping you learn neighborhoods, building your real estate team, etc.

With this, I would like to implement the BRRR strategy but am having trouble estimating rehab costs.If anybody could help, or connect me with someone that could, I would greatly appreciate it.Thank you all and happy hunting.

The pro-forma estimates just don't  provide enough information to plan long term.

You should estimate th property value using recent sales data.

Speak to a Realtor or Appraiser: Get a more detailed estimate of what the property could sell for with and without renovations, as well as its potential value after adding an ADU.

I'm having a hard time finding any estimating tools for this kind of a project, adding a story and multiple BR/1 BA, and wondered if there were any tools, sites or recommendations any of you have for this kind of a project. 

IF you plan on going back someday, and this is the home you want to move back to, then renting it would be a good idea as long as you estimate that it will cover itself, or preferably, cash flow, which it appears that yours will at @ $2K or so per month (after expenses). 

I've read many of the BiggerPockets books like - House Hacking- Flipping- Estimating Rehabs- Multifamily Millionaire Book I and II- How to Invest in Real Estate with Low or No Money Down- Investing from a Distanceand even some outside of themand have been wanting to do something in Real Estate for awhile.