Just in terms of the website and your regular job. I would urge caution there and make sure you don't make an already stressful situation more so by the loss of regular earnings. Also, are you burning yourself out a little there? You can't be all things to all people you know?
Can I also ask - honestly, what unmet needs (which lead to resentment) do you think you have within the marriage?
I don't plan on resigning until I know if the app will work. My family has commented to me that they think I am doing too much, but I feel stuck in between a rock and a hard place. My W needs help so I want to be able to be home with her, but I need to work to support the family. I did alot of extra hours to pay for the nanny for that period, and my w and her family got upset with me cause I was working alot. I really wish I didn't have to, but I didn't have any other options. What makes it even more frustrating, is that my wife's mother was living 5minutes from us and was helping, until she decided that "it didn't feel right being in Sydney". Shes from Brisbane and moved to Sydney to help my wife. My w will be staying with her when she goes interstate to Brisbane which worries me as well. We've never got along for different reasons (she refused to be here when my w had her baby shower for our second child)
Regarding the unmet needs, it's probably more about double standards. A few days ago, I took the kids to visit my sister while my w was working at our florist. I told her that I'd head home when the kids were due to sleep. She didn't like the idea and thought it would be better for me to get them home earlier, but she has no issues doing what I wanted to do when she goes to her brother's place. It took 15 minutes before she said it would be ok. When she's mentioned it to me, Ive had no issues with it. Another instance on the same day was she got home 30 minutes late from the florist, which again, I don't have an issue with, but 2 days earlier, I was home 10 minutes later than she thought I should be and she called me as I drove into the garage and started abusing me. When she got home from the florist 30 minutes late, I told her that I wasn't upset because she was late, but if the roles were reversed, she would of become angry, and she agreed.