My first thought was to suggest asking the seller to carry-back the amount they needed but thought to myself, there’s gotta be a market for this kind of thing.

If you earned too much to take the passive losses, you would have carried those passive losses forward and they would have reduced the impact of depreciation recapture. 

If buyer can get a loan for 80% or 200K and the seller carries a 2nd for 50K, how would that affect a possible 1031?

Could possibly even get owner carry. 

Partnerships can be awesome cause they allow you to do bigger projects and more projects but keep in mind that while you might get 50% of the massive profits your also carrying 50% of the risk and debt that it takes to go after the bigger payouts.

On apartment building Buy and Holds Privatecashfunding.com can do 10% down with 70% 1st, with 20% seller carry back, CLTV  90%.

@Carrie Angyal Thanks, Carrie!

The problem is definitely a supply problem and government carries part of that blame - make it easier to build new units and that will be much better help than rent control. 

As mentioned, an LLP is usually for a professional services company and in Florida, an LLP is required to carry insurance. 

Loopnet is a great resource, and you can also search for terms in the public remarks of a listing like owner financing or owner may carry.