OP come hell or high water you will go out Thursday. This is step 1 for all of us who have invested in you. You will tell DH tonight, I've confirmed I'm out on Thursday, if you can't guarantee you'll be here I'll get a Nanny in till I get back.
Sure you can afford a proper babysitter.
The problem with 'investing' is it's not much different to say roulette. It is gambling as you don't know if the shares will go up or down. If he wants to truly invest, get him on something like ... ahh can't think of the name ... but basically you pledge money to projects and you get something in return.
It's more ethical as he's helping a start up and it's not for gain in any way. You see on the site projects that go crazy, maybe such projects he could get in touch and ask about buying a bit of equity. That way he can know that a project is popular and can be pretty much certain on a return.
Do you ever think him going away or having days out at weekends is cheeky? I'm guessing you're a SAHM, you say he could retire now if he wants, but he loves the buzz of it all. In the mean time silly things like you doing up the house he wants to know details. Does he give you minor details about everything he does?
Not only that it's another form of gas lighting, I've thought about it, last night you get everything ready, no doubt he knew you'd got it all ready, this morning he goes I'm cycling. You feel stupid, undervalued a whole host of emotions. He says if you're renovating I want to know, but when you let him know he downplays it to a spreadsheet, then it's what's this for. Wasted effort and again under mining you.
You ARE HIS WIFE NOT EMPLOYEE!
I can imagine most of your communication is like this. Whatever you have to say is irrelevant as he did something so much better/important. How does that make you feel? How would that make anyone feel?
OK hands up it may be trivial to what he's done / doing / achieved. But you are in a marriage that should be 50/50.
You feel rough, he takes the children out. About time he did something after his day out by himself. I bet you're eternally grateful, aka another ego boost.
Does he involve himself in the children's lives, or are they primarily your concern?