If you don’t account for this upfront and a washing machine goes up, then the roof needs redone in 4 years, or the garage door needs replaced- that will eat into any cash flow you have built up for x amount of months.

Unfortunately, I don't have cash.If you go to bank or any lender, the loans will eat my profit and salary.

Barring another Great Depression that shuts down the big banks or worse, I think having a big enough nest egg will allow weathering almost any storm.  

Those will eat your cash flow alive in Texas

If the had roaches where they lived before, there will be roaches and especially roach eggs in their belongings.Is there some source near this house? 

Best advice from my late grandma, a real estate broker from Ft Myers for decades: "don't put all your eggs in one basket."

I am sure there is truth in this, if attendance jumps- people eat around the stadium and also vacation to LA to see the possibly greatest player.

The same boiling water that softens potatoes hardens eggs. 

where it gets you is if you pre sell.. and lumber is going up monthly.. you end up eating it.. 

which eats into your budget big time