How do I tell my Mother that we cannot go out to eat everyday, that sometimes we need to eat at home?

How about say no you can only do it 2-3 times a week she may get upset at first but you are already doing a lot for her unless it is possible for you but I imagine doing what you are doing takes much time to get her ready and into the restuarant and back home and settled into her home. You most likely have many other responsibities.

my dad did the same thing , i got so burnt out on that . well guess what i miss going out to eat now . my dad isnt able to go inside to eat anymore . we would go to drive up window to order and eat in the car .
his swallowing is becomin diffcult , he would choke and gag and be real loud . embarrsing .
now he cant walk and its hard for me to put him in the car . so we eat at home all the time now . it sucks !!!
i wish my dad could still go out and about . he loved going out to eat , i didnt mind it but not at the same place everyday .
enjoy it while u can ....