Accepted offer, when to leave current job to get commission?

In a bit of a pickle here. Hoping this type of post is exactly why Bravado exists.

Trying to decide when to give two weeks notice - or if I even should.

I have about 15k in commission from my current company that I will get when the products I sold (in October...sad I know) actually deliver in July.

Anything that delivers while I'm still employed I get paid on.

I also told this to the recruiter from the first conversation. She said we never want anyone to miss out on money and we'd figure it out.

Now she's saying my new mgr wants me to start mid July or earlier if possible to be included in training, kickoff, etc.

I was thinking it would be nice to have a week or two off in between jobs for a little mental break.

But I'm thinking I may end up having to work at my current job until I start at my new job to make sure I get all the commission I can.

I could put my 2 weeks in but I've heard other people say when they've done that the company tells them they're done basically that day and don't give them 2 weeks.

So, should I:

1. Put two weeks in now with a start date in 2 weeks with the new company?

2. Tell new company I can't start until my commission hits? (Which could be July but could also be August with delays)

3. Work at my current company until the day before my start date in case they try to pull some shit?

4. Put in my 2 weeks the day before I start the new role so that I still get paid through those 2 weeks and collect commission then too?

Weird spot to be in but any and all advice is appreciated!

Edit: They did include a signing bonus of $5k.