For example:"See how [Client Name] cut their supply costs by 20% with our help!""

For property owners in this area, what have you seen in terms of supply and demand. 

. $50 per bedroom, so a 4-bedroom house will cost you about $150~200consumables - bathroom supplies, kitchen supplies, beverage supplies: $20~30 per week, depending on how much you providewear and tear - towels, linen, kitchen utensils, some furniture: $1000~2000 per yearRepairs/replacement for things that guests break or steal:  $1000~2000 per yearAlso, if your personal use is less than 14 days a year, the entire property's expense is deductible against STR income, but if you use more than 14 days, then you will have to calculate the proportion of how many days it's rented out vs how many days you or your family uses. 

Limited labor and resources : Unlike the catastrophic fires in Lahaina Hawaii there are significant resources in Los Angeles to contribute to recover, but quality contractors, tradesman, plumbers, electricians and laborers have long been in short supply.

And the reason why your "tale of two halves" will play out as you described.Demand:  This has actually been high almost all along, but rent growth hasn't materialized in response due to high levels of new supply. 

The rental market is pretty rough here in the Austin area due to a glut of supply.

Have you sent your material list to a supply house to be quoted, have you arrived at a quote with your subs?

There’s just not enough ADU supply (IN MY AREA) for appraisers to base off of.

Appreciation is driven by demand outstripping supply, and cost of new supply. 

Properties are sitting on market for a bit longer now that supply is slowly creeping back up. 50 days isn't too terrible compared to the greater PHX area.