So, for example, a 4-night stay for a group of 12?

An example was a line item for alimony (I am single and have never been married).

For example, to get up-to-date property tax data you would need to scrape every county's tax data website (thousands of different websites, data formats, issues, etc...) then aggregate and clean the data.

For example, I will tell them they must be out within 30 days, but they can leave at any time during that 30 days without just one week of notice.If they reject my offer, then I start to ramp up the leverage.

@Benjamin Goodman gives a good example referencing live in flips. 

Is it possible that at times you lose money (such as soft costs - paying for property inspections for example and the deal ends of falling through)?

For example, you can use this link to get detailed information, https://spotcrime.com/map?

Often times you will pay much more in taxes than if you pulled the money out, paid the taxes and penalty and then started investing in real estate.For example, with the financing you mentioned, the IRA must pay taxes on the portion of the profit earned by financing. 

I have been cold calling direct-to-seller and working with brokers to find deals.I don't understand how properties, in East Boston, for example, are trading at around 5.3 cap when rates are around 6.5%.

Take this example and remove the LLC as a part of this conversation for simplicity.