Additionally, once the taxes get sorted, I'm going to look into refinancing and pulling out some cash and rolling that into another deal or two. 

I would try and created a binder of some sort showing your income, your investments, and all your real estate that you own. 

But if you want cash out or if the loan needs to fit into some sort of framework to be sold it may not work.

Your tenants can agree to early termination, but it may require you to financially motivate them. 

Whether it’s an even split or some sort of equity agreement, the group members get access to an asset they otherwise may not have been able to afford.Shared workload.

I know that businesses can claim all sorts of expenses to reduce their tax liability. 

I can't see a lender allowing you to have a loan and then sell half of their collateral.You may be able to write some sort of agreement with a family member and pocket the cash, but the lender won't honor your agreement.

That way nothing is "owed" the tenant...if he partially pays for the floor he will rightfully feel he has some sort of equity in the floor.

And is the designation of contractor something you can get simply by registering with the city, or is there some sort of vetting process or other requirements?  

@KL FurnungA buyer who buys a package will be less.The amount of buyers who can afford multiple properties over single properties is less.Furthermore, the person buying multiple properties likely is expecting some sort of 'discount'.I would put them all on the market individually - if you work with a good agent and title company, going through multiple closings shouldn't add that much complexity.Best of luck