It's really about how much traffic the city/area gets for MTR/STR. 

In-house means more control—you’ll manage everything from printing and stuffing envelopes to postage.

No rent control. 

., who might also want to open an outpost, as well as drive local traffic so it's not all real estate and other people want offices there too.

.• Adverse Features: Do any of the comps have issues not considered in the appraisal, such as proximity to a high-traffic road, sewer plant, or power lines?

Dave mentioned control in the TIC but alot of times that is an illusion.

And I may only start getting enough traffic to convert in about 6 to 9 months, that is  IF I am good at learning the SEO and implement it as I should.

You have a LOT more control of cash-flow than you do appreciation.

They need to do all their due diligence including understanding the value that will be added by the ADU, the finance options available, the consequences of adding the ADU (rent control, property taxes, rental limitations, etc), etc.Good luck

There will always be some sense of resentment or issues that you leveraged control ect.