If it’s an older property or has deferred maintenance, you might want to lean toward the higher end.When it comes to CapEx (capital expenditures), planning for major replacements like roofs, HVAC systems, and appliances is key.

I am planning to build a business to replace my income in couple of years so as to have monthly cash flow equal to my W2 income.

And, if you were able to generate $500/mo cash flow as Scott suggests, his method would not replace your income: if you could do only 3 properties a year that would net $1500/mo cash flow and it would take you 10 years to scale it to $15000/mo.

I requested money from the guest for replacement and contacted Airbnb in the meantime, and the guest left me a bad review because I requested them to pay for it. 

The EPA wants all lead pipes replaced, period.

Costs $100 per corner to replace any missing concrete markers.  

I make a decent income in a corporate type job and have an end goal of someday replacing that.

Look at the age compared to there useful life and cost to replace.

It can affect estimated replacement cost and therefore the amount of coverage recommended/required.  

Denis Flory and Frank Mooney promised to have a replacement address for your properties and they still have not provided.