Best way to find end buyers is to ensure it's well marketed - Professional photos, professional clean prior to listing, aggressive list pricing.

The seller can pay for it at closing (the title agent will cut the check to the trade to ensure there is no resulting lien) and provide proof of the replacement to the insurance provider.  

Yes a partnership tax return will probably run roughly $500; however, it ensures everyone is claiming the correct amount and not drawing the others for audit.

Just ensure you do thorough market analysis to avoid pitfalls.3.

What do you do to ensure that the tenant is responsible for security deposit disputes since that is the largest reason for owner lawsuitsHow familiar are you with the newly changed laws that can affect you the owner if they are not used correctly?.

They'll also help ensure everything is in compliance. 

Selling the property within your Solo 401(k) and returning the proceeds to the account simplifies compliance and ensures tax-deferred growth (or tax-free in a Roth Solo 401(k.)).

The overall LTV (including all 3 mortgages) will be key and your selling point will need to be that the 2nd mortgage ($8k) will burn off in 2.5 years (based on your surprise that it was even out there, I'd recommend that you follow up in 2.5 years and ensure that it's been satisified, so that it doesn't surprise you again in the future).Does the $8k grant vest over the 5 years? 

I'll focus on maintaining the property and optimizing rent increases to ensure consistent returns over the years.

Ultimately, a “win-win” keeps your tenant profitable while ensuring you’re not underpricing your asset.As for notice periods, definitely check your local regs, from what I’ve heard.