That's something I love about my wife. She is like yours and starts projects, and then abandons them halfway through, but she never expects me to jump in. Shes told me for a while she wants chickens (I do too, but we can't where we live at the moment), but always follows up with "I know you have to be on board too because I know I can't keep up with it on my own" (shes partially disabled). She's like this with everything, and I really do appreciate that about her.
Since we've lived here, she's wanted a large garden and I've just been "meh" about it. As of late, though, I've changed my mind as I want to start giving away fresh produce to those in my community who can't afford it, so I drew up plans for about 1600sqft of planting space that takes up about half our back yard and showed her, and she's pumped about it. It's going to be an expensive ordeal but I'm going to partner up with some local nonprofits for it who are going to help foot the bill for it with me.
She started going into all these plans she wants to do with trelleces and whatnot, none of which were a part of my plans, but that's fine. I know she will start them and not finish them and i may get to them eventually, but I have a hell of a lot of raised beds I need to start building in the mean time....and I have to figure out how I can get a dead pine tree removed thats near some power lines without it eating up the money I have to set aside for the start of this.
Anyway, sorry for the tangent. I was originally just coming in to say I know how you feel about the project stuff not being done, and I'm glad my wife doesn't expect me to step in. Hope yours is doing better man!.