You need to work to get this kind of money b. By the way, its's a good feeling.

"By the way" feels like we are talking about something unrelated or only slightly related, like if I was talking about a pizzeria down the street and then said, "Oh! By the way, did you call a plumber to fix your broken sink?"

However, these two concepts are related. "By the way" can still work, but I must warn you that it can sound just a little impolite when the two concepts are closely related (working for this money | is a good feeling). If you want something more polite, "either way" or "plus" is what I might say in this situation.

This doesn't happen.

You could also say "This is very unlikely to happen."

You need to work to get this(hard/ a lot) to get this (amount of) money, by the way itsthat's a good feeling.