As a basis I look to generate $1000 minimum per month of pure cash flow (after cap ex / prop mgmt) for $100k cash invested into properties. 

Of course I say this as someone who owns their primary residence for purely non-financial reasons.

If you are looking purely for CF, then yes, I think that secondary and tertiary markets outside of Barcelona (there are some neighborhoods in Barcelona too) pr in another region in Spain may be a better fit.

It won’t make sense if we go by biggerpockets calculator/by pure numbers and there are no such properties available in our area that meet 1% criteria.

I have found a solid balance between high cash flow and a pure appreciation play to where I'm comfortable.

Remember, SEO is just pure logic.

Nothing like the pure, unadulterated fire of motivation!

You haven't had vacancy, but that's probably due to pure luck or because you are below market on the rent and your tenants don't want to lose a good deal.I think it would help if you crunched the numbers to see how much you are actually losing. 

Not from the property owners but from the tenants. 90%+ of lawsuits I see against managers from tenants are pure junk. 

Pure speculation here but I think that if one really thinks that their liability is extremely limited I don't see them fleeing the USA.