Owning locally has helped me accumulate considerable equity with a relatively low initial investment.

I have individual spreadsheets for each property that I used in my initial analysis for purchasing the asset of course, but I'd love to see everything all together now with real-time numbers.Where can I find something like this?

I think initially it makes sense to find properties that already have finished basements, in-law suites, etc. as converting those spaces to ADUs will be inexpensive and create a significant amount of rental income ($2,000/month+ in most areas close to the city).

The best time to request a background check is after you’ve done an initial screening but before committing to a lease.

I'll be looking for long term rentals that don't need any major repairs initially. 

Quote from @Mark Sullivan: Quote from @Tim Delaney: One missing piece of info here is how much cash you have available to invest at the moment.My initial thought was sell LLC B and hopefully you have a few hundred thousand available on top of that to buy the new building.

My initial plan had been to do something like Rent-to-Retirement or REI Nation- assuming that I'd be leaving money on the table to pay for their expertise, but hoping that I would learn through the process and develop the confidence to strike out on my own later. 

In terms of creative ideas, you could look into leveraging that construction experience and partnering on a deal to ease the initial capital need.

It's not clear in your post how heavy of a lift these entitlements are but assuming value is being created before a shovel enters the ground the initial LP investors will want to be compensated and share in the upside that's been created.

I'd be seeking someone to fund the down payment of the deal and I would be responsible for property management/bringing in funds for initial renovations for a profit/split.