Hello and welcome, sonofagun!

Wow, it sounds like you have a lot on your plate at the moment between your wife's problems, money troubles and a son in drug treatment. I'm so sorry. But I'm glad you've found us here. We're a supportive group and we can understand what you're going through.
We want to help so let's take it a piece at a time. Is suicidal threatening something your wife has done before? Threats of suicide are actually pretty common in BPD situations. How do you respond to her threats?