I was in a similar enough position, so I thought I would weigh in. A few years ago I was looking into Masters in RE development programs, for knowledge and for a credential that could be used to work under/partner with an existing developer. There were no local programs, all would be online.
I was ultimately swayed by people in my orbit to get an Executive MBA (no specializations, canned program), for the network and for the serendipitous possibilities that could come from my fellow students and the professors. I went to the best school available locally, due to familial obligations.
I finished a year ago, and I was very critical of the quality of the content, given the cost. Did I learn anything earth shattering, no. I had a Finance undergrad, a grad cert in RE Investment, and had studied business for twenty years post undergrad.
I did get introduced to a local group of mostly alumni that is focused on the buying and growing of existing businesses, which I believe will be more valuable than the time and cost of the degree. Most of the projects that I am working on right now are a result of that group and I am actively searching for an acquisition target in a RE related industry.
Would I be where I am without it, I can't say that. Maybe I would have been somewhere equally interesting if I had gotten the Masters in RE Development, which I still might do someday, given enough free time.
Does anyone that I meet say "Oh, you have an MBA?", no. But they do say "Oh, you went to Case?", (for what that is worth). And where I am headed I think that the credentialing and clout that carries locally is beneficial, though definitely not required. You could bootstrap the education through self study and reach a similar network otherwise, but I made a call and saw it through.
If you are not in a corporate environment, and you are paying for it yourself, the ROI is going to be what you make of it.