[CoffeePython]

In general for someone trying to get in the field I typically say get a degree IF it makes sense in your lifestyle.

New grad from high school and wants to get into CS. Get a degree if you can afford it.

Took a few years off of college, really interested in CS, can afford to go back to school (even if afford means loans and it is a public university). Get a degree.

Mid 20's with family and children, main breadwinner, can't afford to stop working. Think hard about the decision to go back to school. Explore other options.

In general, it just has to fit with your lifestyle.

In your particular case I'd highly suggest not going. You already have a bachelors and a masters. Plus 5 years experience. The barrier to entry to get into the sub-field you're interested in isn't credentials at this point.