First, you'll need to consult the contract your potential client has with Evolve.

From my experience, the most reputable/reliable GCs will charge for a scope of work and overall consultation/advice.

Do your homework and reach out to some of the companies that offer these types of self directed retirement accounts for some free consultations...

If you're unsure about the legalities or the best approach, consulting with a property management company familiar with local laws or a real estate attorney could be invaluable.Best of luck with your new property and navigating this transition smoothly!

Writing the Contract:**It's highly advisable to consult with a real estate attorney who can draft a comprehensive contract that outlines all the terms and conditions of the seller financing arrangement.

Who is the appropriate professional that I would need to consult about legal aspects and benefits of moving my rentals into LLC?

Those tax returns are due by June 15th of each year and you should consult with your tax professional.W-8ECI Form remains in effect for a period starting on the date the form is signed and ending on the last day of the third succeeding calendar year, unless a change in circumstances makes any of the information on the form incorrect.

Definitely consult your attorney on this one

That said I would definitely consult with both a lawyer and a CPA before making a decision. 

The laws there can be much different then we are use to in the US, so you should consult a local attorney.