I'm 45 this year and last year I did my first startup as a salaried employee. It failed when pretty much the number of customers we had when I started was the same when the plug was pulled.

However I've just gone back to consulting for 6 months to build a nest egg to begin my own start up in the summer.

BUT I know I can dip into consulting should it get tight. You seem to have got into the startup but forgotten how to keep yourself alive.

Being an observer, I would suggest you get yourself a consulting job pretty sharpish, let your partner continue full time and you contribute as you can in your evenings and weekends.