Hardware R Us

The local store.

What's on sale
Amongst other things, they have on sale the following items:
 * Held Items
 * Fishing Rod
 * Flashlight
 * Crowbar
 * Hammer
 * Misc items
 * Bottle
 * Ink Pen

Renovation
You can pay them to renovate either the Cassie's safehouse, or the Milk Farm's back room. Both would cost you $10K, and take several days (the rooms would be unavailable during that time).

Note what you can't renovate the Cassie's safehouse until you finish the Cassie's rescue quest, due to her distrusting the outsiders, and renovation requiring to reveal this place to other people she doesn't know yet.