(I am looking for private lenders who don't charge interest but rather take a portion of the profit.)I emailed the support desk for a refund. 

I suggest you enter private money goldmine in search botton at top right of the screen and read the previous posts....here is one that gives good perspective as well as a link to legitimate private lenders.http://www.biggerpockets.com/forums/92/topics/1488...

WIll Trump continue the support?

The #1 way to build a pile of money?

How do you become a broker for hard money lending? 

I’m interested in using hard money for a BRRRR or flip project, and I’d like to take the first steps toward making this a reality.

The road to recovery is long, messy, and full of setbacks—but it also taught us something important: with the right support and determination, rebuilding isn’t just possible—it can create stronger, more resilient communities.Now, as wildfires tear through LA, I want to share the lessons we learned to help others rebuild with hope and purpose.

Your taxes are none of the ex wife's business and this would seem to address your concerns.I would also put her on notice that future requests for financial discovery will be two-way and if a discrepancy is seen in the other direction you will seek support from her.

Providing strong supporting data from your Airbnb bookings, market comps, and STR reports will strengthen your case and help you close faster! 

I have not received any return on my money.