IF I AM WRONG, can someone please point to me where EXACTLY in the CRS that it states anything about a specific number of nights per year booked and where that does not conflict with this home being your primary place of return i.e., guys lives in his car in the back alley so he can rent out his house as an alternative to losing it because (reasons), is this not his primary residence? 

Before making any decisions, it's crucial to consult with a legal and financial advisor who can provide personalized guidance based on your specific circumstances.

Are there specific renovations or improvements that have proven to be more effective in lowering insurance premiums?

The golf sim will help garner more bookings but I do not think you can count on it to generate a specific amount of revenue.The ADU I would get real world prices on cost from a GC and then calculate the return based on other units with ADU in your area or if no comps you can get an idea by +1 the bed and bath and looking at larger comps in your area.  

Prices are also area specific , if you live in an area with a high cost of living , you will pay more . 

Maryam,I am over here in Pinellas County by the Gulf Beaches are you loooking in any specific counties?

Where is the lot specifically located?

The point I am making is the decision the GP makes is circumstantial and very specific to the fact pattern of their particular deal and to tie back to my first post in this thread, who that decision maker really is is important. 

Hi All,This summer, I would like to buy a duplex to live in and rent half.I subscribed to BiggerPockets so I have access to the tools.I read this:https://www.biggerpockets.com/...Is there any specific advice you would have about buying a duplex in the Atlanta area, or building one if that is possible/feasible?

This process varies by jurisdiction, so you'll need to research the specific procedures in Franklin County.