Your agent with experience can help you identify properties that would be a fit for a 203k loan and then guide you through the offer/transaction process which is a lot of times very different than a traditional purchase.

I have read a couple of articles that bemoan that homeowners in expensive locales will suffer, however little to no impact to less pricey areas and a net probable boost to landlords.Live in flips will certainly be less profitable if the capital gains exemption increase from two to five years! 

Things to consider are annual co-commissions (essentially franchise fees), annual co-commission caps, desk fees, transaction fees, advertising fees, systems/platform fees, training programs, the schedule required, and then access to principal brokers and or mentors.

To make the situation even better, you can structure a transaction so you are not owed anywhere near the value of the property.

Your questions are great, but not any that I can answer without specific knowledge of the taxpayer and the transaction. 

I send everyone to First Financial NW Bank for commercial products.

Which product type will generate you the most return on your investment. 

I think that should be ok if the parties involved are used to foreign transactions. 

The question is: can my Uncle's estate IRA lend me money for a real estate transaction as I am a non liner descendent?

Product sheet on the site.  10,000 loan variations plus a net branch system where you can learn the lending side of things and earn on both sides of the fence, doing your own real estate deals and the ones you don't offering financing.