Unfortunately, I have found that sometimes Excel thinks it knows better than I do what I need, and when I format the cell as text and then enter a number it autoformats it back to number 😱.
And alternately, when I enter the number first and then go to format the cell to text I have already lost my zero.
It is always quicker for me to just put the ' in there and forget it!
Just be careful with using ', as it does make it a text formatted cell - i.e. that value will not be computed in certain formulas. I ran into that not too long ago where a few random cells in a column had been set as text via ' - and it took a few minutes to track down why the totals didn't seem quite right...
Otherwise though, it's a quick and easy way of showing a zero...