How risky are multi-family units w/ storefronts?

[Derek Lamonde]

Hi,

I've been looking in the Easton, PA area, which has restoration potential but also a long-standing shadier element. Like many previously prospering PA towns, certain industries have gone the way of the dinosaurs w/ nothing on the horizon to back-fill the vacancy. Many of the buildings that show promise have storefronts with some currently occupied and others also having pursued the dinosaurs. At the moment, I have an aversion to storefronts since your rent is contingent upon their success. As they are also often specific to the type of business that currently or last occupied, I'm curious as to who is typically expected to foot the bill for "building to suit"?

I welcome experienced driven pros/cons feedback from the BiggerPockets community....