changing your own oil - is it worth it?

We are talking about an RV dealership right? I like the guys, trust them and have a good relationship where I go. Been taking all my RV's there for a few years and never a problem as a result of maintenance. I can count several times on here where someone mentions a stripped drain plug or just not doing it right. It's never happened to me on an RV or any other vehicle I own or have owned and I can't remember the last time I changed my own oil in a daily driver. Am I lucky or is this a bit of doom and gloom self justification for changing it yourself? granted there are slam bam, here's your hat what's your hurry places and I don't go there. Changing the oil is not rocket science. I only pose the question because the margin between me doing with litte time, a gravel drive and quite frankly no real desire to do so, to save $20, seems logical to take it where I've had good luck and great service. I get under the MH from time to time, check things out etc.