I worked with a SSBBW, possibly 300 lbs or
more, who sat in a wooded captains chair and
it broke underneath her. I think it was at least
20 years old. This was some time ago, so
I don't remember if it was the normal chair she
sat in.

It might influence visitors to your abode, if you
have prints of Rubenesque and Botero paintings
or on your desk. This would at least influence
them to see what you found attractive , also
some plump actors photographs.

Is here looking at other heavier ladies, when
they pass by? This might indicate he likes them
and you.

My belly has gotten big enough, that it hangs 1 to 2 inches. I have wondered what I would look like, after gaining 50 to 100 pounds. As a man I have wondered how it would feel. Would it become large enough, that I started to waddle as I walked. It is not something you can easily ask someone.

I was open to a couple of coworkers, who were married BBWs, that I found BBWs more attractive. I thought it would help me with any other single BBWs, when I tried to date them.

Perhaps you should look at what foods the human digestive system can process easiest. This would give your stomach more natural nutrients, and the money spent on additives, could be spent on more food.

I have thought that it might be easier, to eat a prehistoric diet. Your tribe just killed a mammoth and are eating as much of the meat as possible, before it gets to be spoiled.
After 5 days, you might only drink liquids. You might not eat for 24 hrs and your body would think it is starving, so it would cause you to eat more, to have reserves, when you didn't kill another animal.
Another variation on this would be to exercise as you ate and don't on the 6 th and 7th days,when your body would be expecting to need to replace the calories you would normally need for the exercise.

You have to watch for bakery goods like pies in the store, that are 5 days old, as I didn't notice and was sick.
The problem with dumpster diving, is what has been thrown on top of the food and can it be cleaned off.
I was reading about stores donating expiring food to food banks, which was still edible. It might be better to see if you can make a deal with a small store, buy their food and have a weight gain orgy.