Usually it takes them weeks to respond and they come up with some crazy stuff like by business is paying for the trip and need to pay with a certified check outside the platform.

I am not an expert on the spanish tax system but I am reading upon it - It appears that your worldwide assets(Properties in the US) would be subject to Spain's 'Wealth Tax'.Spain is a great place to live...but their tax system is killer

Experts suggest this may be wise for businesses with simpler structures to avoid future headaches.2.

My recollection is (and insurance experts on BP can correct me if my memory is wrong), but most insurers will only pay "replacement cost"  policy limits, if you actually replace the damaged property.

Ask an expert of course but that is my idea for it! 

So multiple eyes and local expert providing local cost and input on lifespan.Here is an example that has a part that is more expensive in my market than other markets (unlike most parts that are the same everywhere, so in this case your cost should be significantly less due to both cheaper part and cheaper labor): $1600 40 gal water heater installed (this is good price for a plumber, a little high for a handyman) with expected life of 12 years (i have some that go 20 years and some that die in less that 10 years (mostly rheem die in less than 10 years), 12 years is fair life expectation

You’ve heard from several experts I respect so nothing I say below is any reason to believe otherwise.

The solar system adds no value to my property for rental purposes, and I may even be ripping up the roof & replacing it in the new year.Beyond sending a nasty letter through my attorney via certified mail, demanding the company come pick up their equipment, am I required to take any further action or fulfill any obligations regarding these contracts?

The most common is leaning on your agent for their expert advice.

Specialist tend to get large volumes of clients as they are seen as the expert in the field.