I am considering Delaware or Nevada as the location for my LLC.Im not so concerned about the asset protection the LLC provides, as as far as I can see a good umbrella policy will be sufficient, but more so any potential tax implications that not using an LLC would expose me to.

It's a duplex in Delaware, OH.

I own an investment property in Wilmington, Delaware and the townhome has a mudroom extension on the back (5x10) that needed to be demolished and rebuilt from the bottom up because it was old, leaking, etc.

For example, in Illinois you can file a Delaware or Nevada LLC, but if you do business in Illinois you must file as a foreign entity registered to do business.

I'm in Los Angeles...market is higher than ever...bordering communities (westchester, playa de rey, are heating up and have been for a 6-8 months.  

Does anyone know a Spanish fluent attorney that practices landlord/tenant real estate in Delaware?

Perhaps you might want to request that the seller deliver that unit vacant upon purchase.While the deal doesn't look like a slam-dunk today, if there is market upside and you are able to de-risk it by having the seller deliver the 2nd unit vacant, it might worth seriously considering.

The risk to the US dollar is increasing and the value declining as the de-dollarization of the global economy accelerates. 

I use Corner Escrow, Christy De La Torre and First American Title, Noah Prestwood.Good Investing...

The DST (Delaware Statutory Trust) structure is where most of the 1031 money goes now, where investors buy beneficial interests in the trust, a master lease is put in place with the sponsor acting as master tenant and distributing funds in the form of "rents" to the investors.