If you are asking if an RV is worth living in in terms of that it is less expensive than a house? Absolutely not.
If, however, it is your plan and purpose in life to be mobile and traveling throughout the areas you have access to, and that's a completely different story.
I'm afraid your question is to open-ended to answer.
if you include maintenance and depreciation of a new one, sure. if you bought a used but very well maintained one and were able to do most repairs yourself and get free fuel, then its probably closer.
It can be, parts for RVs can be very expensive. I paid over 400$ for a new water heater for mine. And we were just living in one while we built our house, no engine maintenance required. Also god help you if the onboard AC breaks. Difficult and costly to fix.