It's really good to see you around again Harbl, we've missed you.
I'm sorry that you've had to get to such a low point to be able to come back, but I'm glad you have, as GonZo said it is a pretty good support network here.

I have nothing to say that will help with your dealings with your daughters, other than to say that what I do know of you suggests that you're doing your best to be as good a dad as possible. The fact that you've announced your shortcomings and have tried to change them puts you so far ahead of so many people it isn't funny.

As for developing a tolerance, switch strains for a while, it'll help.
Going on a drug-holiday for a bit also helps, but it'll take more than a couple days.
Or, a couple day break will only be marginally helpful.

For Mrs Harbl, just be loving and patient. It'll be hard, but there's not much you can do to help depression itself, that has to be her job. Do what you can to eliminate the in-law anxiety.

Please, both of you, be very careful using pot to deal with mental health, it can be quite dangerous and make it much worse. I'm not saying in all cases, but it can exacerbate things, and can become addictive in its own right, searching from some relief from depression.

My heart goes out to you bud, there may not be a lot we can do here, but we can listen.
And rib you about being a Brony