(fyi there is 84 flavors).

See following IRS page (https://www.irs.gov/retirement-plans/plan-sponsor/401-k-resource-guide-plan-sponsors-starting-up-your-plan)However, the distinction is that the solo 401k trustee may not receive compensation for performing such managerial/trustee functions.

With that many years on the earth i challenge you to find your competitive advantage as you will have distinct advantages over others in their 20s or 30s just starting out because of all the relationships you have built, skills you have acquired, and places and situations you have seen.

@Michelle Belinfante I use CallRail which gives me 10 distinct numbers to identify marketing funnels from.

I recommend having a coffee bar if you have the space with different options and flavors.

Let's calculate that out and see that it is similar to the overage with one big distinction.   

I thoroughly appreciate the nuanced distinction between "investor friendly" agent vs. an "investment realtor".Thank you for taking the time to construct this material and to upload it into this discussion thread.If I may ask, how would the interview questions be modified if one is looking for an investment realtor to locate a property suitable for house hacking?

It's an important distinction to make.You're right that passing on legitimate increased costs to customers is a normal business practice.

State chartered credit unions can on a case by case basis depending on the state so it’s important to understand the distinction when borrowing from one.  

The ADU / MIL distinction is important for your rehab costs too, as an ADU will require a full 8-12 week permit review, and require separate heat, a separate electrical panel, and a separate hot water heater.