Hmmm... lately I haven't been relying on cookbooks. But I know what it's like to get home late ravenously hungry and not want to fuss a lot in the kitchen before you eat. I make extra portions of things I like and freeze the ones I would be eating later in the week. I might put them in the main refrigerator compartment to thaw a day or two before I wanted to eat them, and then re-heat them. This is especially necessary because beans and whole grains take so long to cook, and you and your fiance probably be eating them quite a bit if you're eating vegan meals with no fake meats or soyfoods.
I haven't tried leaving a crockpot on while I'm out of the house on a workday. I use it on the weekends. Maybe it defeats the purpose, but I'm paranoid about a fire starting when I'm not there to put it out.
(Off-topic: your handle means "freedom", doesn't it? I'm sort of a novice gaeilgoir)
Peasant (1963-1972) and Fluffy (1970s?-1982- I think of you as 'Ambrose' now)- Your spirits outshone some humans I have known. Be happy forever.