Here's what I'd do: Talk to the L about temporary child support and visitation. You *need* a regular income, it is not right that you should have to ask for money for food for the children.
Once you get the figures from the L (this is a worksheet that shouldn't take more than 30 minutes to figure out), ask the L what reasonable visitation would be in your circumstances and state.
Ask the L if you have to give him access to the home for visitation or other purposes other than getting his things.
Once you have that information (and I'd try to get that on Monday), you can e-mail WAH and tell him: "These are the state guidelines for child support, can we set up an automatic draw from your account to mine on a weekly basis? I would prefer that we come to an agreement between the two of us, and these are state regulations so not really anything to disagree over."
Then send a separate e-mail and say, "I'd like for us to come up with a regular schedule for visitation so both I and the children can get into a routine. Please let me know many days/nights you would prefer to have the children and how often."
Knowledge is power, and if you go by state guidelines, there's no real room for argument.
You can also look into a temporary separation agreement - it doesn't have to go into a D - although some L are like that, they only want to funnel you through the process asap. That agreement could regulate things like having OP around the children.
M 16 yrs, WH62, P54 3 adult blended kids EA 11/13, BD1 6/14 PA fall 14, BD2 2/15 Piecing 2015, BD3 12/15 Separated 4/16 WH moved OW in 5/16 Divorced 6/15/17