Last year I spend $9500 additional in bookkeeping (not including my accountant or tax filing.)

In addition, the book keeping and legal involved with a syndication process is greater than if partners are not involved.  

If real estate is involved, separating it into its own LLC before the sale can simplify the process and make it easier to leverage a 1031 exchange.This post does not create a CPA-Client relationship.

Whether it's considered an arm's length transaction is debatable, but it's not illegal.Move forward with the sale and ensure full transparency with all involved parties, including your CPA.

Maricopa County ranked among the counties in the state with the highest number of foreclosure filings.

I'm going to reiterate what's already been mentioned above, but I'm going to actually give you examples of why it's relevant to you to find a U.S. tax professional.1 - You're going to need to file U.S. taxes once you have property down here, there's federal filings, state filings, and sometimes local filings too2 - Tons of tax treaties between the U.S. and Canada that are easy to miss and can cost you a lot of money (important one with rentals - effectively connected income - if the professional you talk to doesn't know what this is, run away)3 - The amount of days you spend in the U.S. needs to be tracked and if you go over a threshold, all of your worldwide income could be taxable by the U.S.4 - Selling real property means up to 15% of your sales proceeds might not be available to you for years (FIRPTA)5 - Lots of nuance at the state and local levels, which both want to take as much money from you as possibleMain takeaway here is that you should find a U.S. based tax person.

., FTC, HUD and others and the FBI does actually get involved to see if there is a pattern.   

The value added should be significantly greater than the cost of the effort to compensate for the effort involved and the risk. 

Did you check to confirm they filed a form d with sec?