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.

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.  

I've had one real eviction that took 1.5 years due to me not knowing the eviction process and giving the tenant the benefit of the doubt.

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?

I would be glad with any direct or indirect recommendation/comment related to the subject!

The personal benefit is such a grey area but I don't think they'd give you the benefit of the doubt. 

I don't believe that I would actually walk away at that point as there are other benefits to remaining with my current employer for several more years.