As a former NPS employee I can shed some light on how this process works. First the NPS will not be funding much. It will all be private or foundation money and local government action. The best example one can find is Lowell Mass. I visited that park back in the late 80's and the neighborhood was a dump, and the park was just coming together. I went to the park and was advised not to wander too far away from the parking lot.
The community embraced the park idea and worked to revitalize the area. Two years ago I visited again and chatted with my fellow rangers at length. I walked a totally renewed area.
I know that the NPS staff are conducting the similar types of programs to engage and educate the local community but it's only 3 or 4 rangers still. This will not be a quick transition and it will cost a great deal of money. That's the biggest question: "Where's the money going to come from?" If you want to know how the development is progressing you need to look into the public records and follow the local planning commission.
What's your tolerance for risk and what's your timeline? If you want a quick buck I'm not sure the NPS is going to be your savior. If you want be a community developer and take the long view they an investment in the area will probably pay off.