Regarding free usage, fair question. I understand the exploitation of photographers by trying to get free images and the devaluation of the commercial market. But this isn't Anheuser-Busch asking for images, it's a local craft brewer in the same small town where I sold prints through a gallery for a couple years. My first thought in reading the email was how to monetize it, but after considering their offer to include my name and website on every label, (which is almost never done in paid commercial work) I recognized the potential to gain additional recognition (free advertising) in the community. I'm more interested in pursuing a few fine art sales than doing commercial work, so this path is more in line with how I wish to move forward. Additionally, the images in question are of a significant (to the local community) historical structure that no longer exists. If I choose to go the money route, it would be easy enough for the company to "put me on hold" while they go through several other artists in the area until someone agreed to free use. Being able to have my work promote the history of the community via free commercial use while receiving a small bit of free advertising in return works for me in this particular scenario. I occasionally get an unsolicited sale from someone who stumbled across my website, so increasing the number of times my site appears in the community improves the odds.
Regarding the liability part, as I said I'm not really into commercial, so not my area of knowledge. I simply recognize the nature of our litigious society in which anyone remotely associated can get sucked into things not of their doing. Could be I'm entirely overthinking that part.