They prevent the Solo 401k participant (as well as other disqualified persons such as some family members) from transacting with or benefitting from the investments of the Solo 401k.

You also have to consider your budget for improvements, if any, and how would the owner participate in them, if at all.

It seems a recurring theme that networking is key to finding deals outside the MLS among those listed by @Ronald Allen Barney I've heard RE bloggers, those with website bios, those participating in forums such as this, and in person discussions as being ways in which people get to know you and begin to develop a sense of who you are, so later they may think of you when something comes across their desk.

Feel free to participate in any of the forums that are available to you.

Have you noticed a bump up in the number of participants that are not local? 

Of course an LLC can be added if additional liability protection is desired, but with an IRA, you must have an LLC to obtain checkbook control.Were you referring to the participant loan feature when you mentioned the Solo 401k supporting the business?

Feel free to participate in any of the forums that are available to you.

This meeting will be a lot like the last where participants ask questions and anyone can provide input.

But I've always believed in the value of a mentor - someone experienced in the industry from whom you can learn through osmosis.Having the benefit of working in this industry professionally, I've participated in the acquisition/disposition of over $1.0B+ of commercial assets - multifamily, retail, industrial and land.

Rental activity is always passive even if you materially participate (unless you are a real estate professional).