Sheena, I was thinking about this after I posted this morning and thought of some things that might be helpful to you as you don't have the resources around you to help. (Here I go with a list again. LOL)
1. Keep easy prep meals on hand for your "down" times. I always have those on hand for when DDs have to cook. Sometimes they are pre-packaged things like orange chicken and easy prep rice that you just put in the microwave. Sometimes when I cook, I cook larger meals and freeze the rest for these days. I'll make a large pot of chili and what we don't eat I freeze in single size portions.
2. Take advantage of places that deliver food, meds, and other necessities. If your local grocery does not deliver food Amazon has a whole grocery section. I know that it may cost a little for shipping but the prices are close to what they are in the store and you save some energy.
There are other sites that deliver things like tp, shampoo, toothpaste, etc. I have found these to be a little bit cheaper than what is in the store.
You can also have your meds delivered.
Generally, I don't do this as DDs can drive.
3. Teach DD how to cook simple things. When DDs were about your DDs age I taught them how to make simple things so that when they were at their dad's I knew that they would be able to fix themselves something to eat. I even taught them how to use the stove and cook eggs.
4. Try to spend 10 minutes or less a day "straightening" up the house. Make a game of it with DD. Again DDs are older, but every evening before bed we straighten up and wipe the counters down. It takes all of 5 minutes but it makes a huge difference over all. Things don't get out of hand and overwhelming.
5. Take 5 to 10 minutes everyday to come on here for support.

(I just had to throw that in there. LOL)
Anyone else have some time and energy saving tips for Sheena?