5:1 sounds absurd but I bet most municipal projects that are largely grant funded are probably somewhere between 1:1 and 2:1.
I cringe when I hear about my town getting $20k-200k grants for stuff that would have cost perhaps half as much were my town simply catering to its own needs rather than trying to optimize for getting the feds to pick up the tab. My town's library, several school programs and several intersection renovations fall into this category. The library in particular is pretty stupid for reasons outside the scope of this comment.
I cringe when I hear about my town getting $20k-200k grants for stuff that would have cost perhaps half as much were my town simply catering to its own needs rather than trying to optimize for getting the feds to pick up the tab. My town's library, several school programs and several intersection renovations fall into this category. The library in particular is pretty stupid for reasons outside the scope of this comment.