Bread

The pork shoulder was in a discount bin because it was on the way out so was cheaper per pound than anything else available. There is enough meat on it to feed us for about 2 weeks of 1-2 meals per day.

Sous vide can be exceptionally efficient with regards to energy. There are several resources that dive into the breakdown of the cooking method and cost of electricity but the most detailed analysis I've seen which accounted for cooking vessels, humidity levels, and temperature stability found that at a rate of 15 cents per kilowatt-hour a properly insulated sous vide machine cost $0.30 for a 24 hour cook.

My electricity is slightly cheaper so my sous vide cook cost me maybe $0.40 for the entire thing.

Source: https://www.amazingfoodmadeeasy.com/info/modernist-cooking-blog/more/how-much-energy-does-sous-vide-use

Oh I almost forgot: The cheapest Tofu in my area is $2.30 per pound and I got the pork shoulder at $1.15 per pound. Plus I have yet to find a Tofu recipe that I enjoy eating. I had an incredibly delicious Mapo Tofu from a mom and pop Chinese restaurant in Los Angeles when I was out visiting family but have been entirely unsuccessful trying to recreate it at home.

Why are you being so needlessly judgy? Maybe they have more money coming that will allow them to comfortably pay the electric bill by the time it comes. Maybe they wanted a special meal and buying & slow cooking the pork is how they budgeted their money. We have no idea about OP's circumstances and frankly, it sucks that you felt the need to comment on how they're doing everything wrong. They were excited about their ingenuity in the face of difficult circumstances and just trying to share something they were proud of with the community.

(Btw, I was curious so I did some googling and using this guy's sample numbers, a 36 hr cook would use around $0.60usd in electricity. So changing cooking methods is not really an effective way here to save money.)