Use a tiny 5 cubic foot freezer as side table? I fed a 35 pound dog from half a top freezer refrigerator for a year. 20 smashed tight pounds packed in plastic bags fit nicely in there. Figure how much you need to buy a month and see how it looks in the freezer. If you use plastic tubs then pack it tight rather than doing single meals so you don't waste space.

I have tile and when I feed bones in the house the exercise pen is set up so the dogs don't scatter and eat where they prefer - middle of the living room rug. Some people use a wire crate as the plastic tray is easy enough to clean. Some people train the dog to eat on a towel or buy a mat of some sort that's easily scrubbed clean, a good sized scrap of vinyl flooring that you slide next to the refrigerator maybe. When they get easy bone it never hits the floor but since the dog might want to drop and grab for a better angle it is a good idea to have some way of keeping meat off the floor for sure.

Am on my second food scale. Just get anything that has a reasonable number of good and few poor reviews. The one I have now has an easy to clean glass top. I'm annoyed because I often use pie tins and it's difficult to read the weight unless I balance the pie tin on a bowl though. Looks like this one, no idea if it is the same brand.

Good luck on the chicken. Trade off is it is easier to control the food than the environment.