I'm getting my masters now but only because my school has a program where we can overlap the bachelors/masters and just add one year. So 5 years of school and I get my bachelors and masters in civil engineering compared to 4 years and just having a bachelors. No brainer decision. And if classes were offered in my favor, I would graduate half a year sooner.
I applaud the guys who go back to school. I'm breaking down doors trying to get as far away from this place as possible. The job I'm probably gonna take in the next week or two (company needs to finish up stuff on their end) doesn't require a masters, but it's something that once you have, you always have it with you. I think I will be the only one in the department with a masters degree and I'll be the youngest by a good 20 years, so that will be interesting. In the long run I know the extra year will be worth it, especially when its only costing me an extra year of undergrad tuition, instead of the insane grad school prices.
If you do go back for a graduate degree, make sure its going to be worth it for you. A masters at my school is two years of schooling, and it ain't the lightest workload out there. Easier than undergrad but that doesn't say much. If the company pays for it, get it over with and just do it. Means they have big plans for you, and that would suck to have them turn to somebody else instead of you when a new position opens up.
College degrees can be very useful as long as you go for the right area. Once you get outside the engineering/computer/medicine/teaching field, not many degrees are worth the insane costs of tuition. Get a degree in one of the mentioned fields and as long as you can interview, you won't have a problem getting a job. My school is engineering based and we place darn near 100% of the graduates every year. Heck my department rarely has anybody left for hire the last 2-3 months per year. Most are signed well before graduation. The demand is there. There is always going to be jobs available because they can't be outsourced.
For what you want to go for, I think it will be worth it. You just can't quit halfway through. That's where college wins. Spend the money to get nothing. Gotta get it done. But I think you will be okay