Hi juanfoot151! Welcome to our ALL SPAIN Message Board!
You won't have any problems just "surviving" in Madrid/Spain without a visa - but you won't be able to "live". You'll likely be like many illegals here whom roam from low-paid job to another, living with 10 roommates, and quickly becoming very depressed with your prospects and soon doubt your decision to move to Spain.
And if you're taking your dog, that's another problem. You won't be able to take him/her without a lengthy bureaucratic process and tests. Having a dog in Madrid is much different and much more problematic/difficult than having a dog in the USA.
No one knows the percentage of illegals in Madrid but I'm sure they can estimate. Many are moving back to their home countries lately because the construction boom has gone bust and there are fewer jobs to be found.
If you speak Spanish, all's the better. If not, well, prepare for a long-lasting stinging slap of reality.
My advice to you is to put in your time before leaving, make contacts, work on your Spanish and your knowledge of XYC City in Spain, make yourself virtually Spanish before arriving and you'll be better prepared. Also, save your money now while you can make it in the USA.
If you're hoping to pick up next month and move to Spain you can be near certain of disaster, heartbreak, and walking along the fringe of the law for the foreseeable future. I can't imagine living like that anywhere in the world, constantly stressed, high anxiety, hungry, worried about how to pay the bills or find your next day-job. Must be terrible.
Saludos, MadridMan
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