I researched like crazy over the last 2 days and after all income, costs, taxes including tax benefits, maintenance, vacancy costs, broker fee etc, I expect to get about $200 net income a month for the place.

You most likely will have title costs, possibly attorney costs if in an attorney state, tax adjustments (costs or credits) water/heating fuel adjustments, some states have transfer fees, any lending costs if you have a loan, and I'm sure there are costs I'm missing.

Any attorneys or adjusters here?

I’m not so sure the benefits are as big as they are in the US given that as a trust director you’re still liable and the negative side is that trusts pay additional tax on land.This info is based only on a conversation i had this week so plase do not take as fact any of what i’m saying.

That being said, I would think about adjusting my marketing.

And it's awfully easy with a land contract to create a document that is so tight to protect the buyer that it crosses the threshhold of "risk of loss passing" which means that even though the deed doesn't change all of the benefits and obligations of ownership go to the buyer. 

The place will benefit from new kitchens and baths and I could raise rent from $2100 to $2500 easily.

While I do have some personal experience in this area, in my view, many people like to twist things to their own benefit rather than doing what is proper.  

While you wouldn't be able to transfer existing Roth IRA assets into the Solo 401k, you could utilize some of the other benefits the plan offers over an IRA.

What benefits has it brought you choosing one way or the other?