Quote from @Gregory Wilson: Sorry, NFL Player.

If so, are you concerned about Spain's tax system on worldwide items?

I'm going to reiterate what's already been mentioned above, but I'm going to actually give you examples of why it's relevant to you to find a U.S. tax professional.1 - You're going to need to file U.S. taxes once you have property down here, there's federal filings, state filings, and sometimes local filings too2 - Tons of tax treaties between the U.S. and Canada that are easy to miss and can cost you a lot of money (important one with rentals - effectively connected income - if the professional you talk to doesn't know what this is, run away)3 - The amount of days you spend in the U.S. needs to be tracked and if you go over a threshold, all of your worldwide income could be taxable by the U.S.4 - Selling real property means up to 15% of your sales proceeds might not be available to you for years (FIRPTA)5 - Lots of nuance at the state and local levels, which both want to take as much money from you as possibleMain takeaway here is that you should find a U.S. based tax person.

We have traveled worldwide together on cruises and various different seminars from various different speakers and he smarter than the average investor, going on the type of trips with speakers that he and I have gone to has certainly helped both of us he's outstanding.Dr Butler Portland Oregon 

CA taxes residents on worldwide income but may provide a credit for taxes paid to other states.

Super complicated and an absolute specialty I dont know how smaller players bust into this. 

CA taxes residents on worldwide income but may provide a credit for taxes paid to other states.

Or give any one area a leg-up, besides the initial players like Virginia. 

This development is part of a broader trend that sees Columbus evolving into the "Silicon Heartland," with other major players like Intel and Honda already establishing significant operations in the region.Economic Impact and Job CreationThe arrival of Anduril is poised to become the largest job-creation project in Ohio's history, with the company planning to hire 4,000 employees.

Not sure their volume its certainly not like Kiavi or lima or one of the big players..