If you can’t find any in your market, any contractor with great reviews and comes highly recommended, and is licensed insured and bonded can do just fine.

Fine, you made a mistake, now do better next time.

If you are paying on time, it should be totally fine.  

The slats that they went over with plywood is fine.

If you are proposing something more along the lines of the example you gave, I think that is a fine idea.

With the virus hopefully leaving us and colleges coming back, my business model should pay the bills just fine, and I can flip for fun and take some trips, etc. life to me has ALWAYS been about my family as I grew up without one and as a only child, and the opposite of spoiled.

It all turned out fine, but on this deal we had a lot of babysitting.

If your goal is to buy just one property a year, then all cash is fine as you can refinance later. 

If it all hits the fan, you will still be fine and you can slowly pay down the HELOC.

It's totally fine.