You can then apply that piece rate pricing as "another one of those" across any project you look at.

I have 5 STR’s and I am wondering for those who have paid this money is it something I can pay for 1 listing then apply what I learn to my others?

Add in many/most jurisdictions are (I believe incorrectly applying the law) mandating the existing structure be rent controlled (assuming it is over 15 years old).The reality is virtually all RE investments will do better than adding an ADU.  

I'm trying to confirm the final replacement property identification deadline because the IRS issued a Disaster Notice that may extend my 45 day deadline.My qualified intermediary says they will not confirm the IRS notice applies or whether the 45 day date they gave me is overridden by the notice.

There are limited exceptions for properties that were recently purchased but it does not sound like that applies to your situation.

•After 3–6 months, apply for tier 2 business credit cards (e.g., Capital One Spark, Chase Ink).

ALSO they have regs on rooming houses only allowed in specific zoning, similar zoning as for hotels;  only on main streets in business districts AND you have to apply for licensing and blabla as for a hotel..That said;  there is a small movement supporting rent by the room as a small step toward solving affordable housing. 

Paint is not rocket science, and he asked if I had any work that needed doing, so I let him do the paint job instead of my painter (accepting in my mind that if he didn't do a great job this was going to be charity).

I only sold a few amount of properties but the values of the homes have increased.The government is making less affordable homes(Impacts supply)A lot of the points you suggested such as selling costs and having to rehab the property before sale apply to both cheap homes and expensive homes

This is only good for 1 year and only applies to fix and flip.