How Would You Go About Building Something a Community Needs?

I’m doing a project for my creative writing class and this is our assignment
I live in a small town, and there are too many problems to start with.
High teen pregnancy rate
You name it we have it
And as a student we have to come up with a center that we think our town needs
My suggestion would be a Rehab center for anyone who needs the help,
Drug, alcohol, physical therapy(off in a seperate part)
And like major things we need.
Our town doesn’t have a rehabilitaion center
But our county does, but it’s almost a half hour away to get to that center
There’s also a hospital
But I think having another one closer would be a good idea
So what I need to know is how to go about it
How to spread the word and some ideas of how I could draw it out
And get people to want it.
Any help is great.
Thanks,
Jessii