But then the whole area is essentially on the water, plus all that climate change stuff with extreme weather and all...What do others think about danger of serious flooding in the area?

I'll definitely mention this during my next conversation with my CPA.Which illustrates the danger of getting tax advice from people other than tax professionals.

Thank you in advanced, and I look forward to connecting with you.This is the danger of blind searching for "deals".

Unfortunately it's often not the landlord or apartment complex that believes a certain breed of dog is dangerous but rather the insurance company that will refuse to provide coverage for certain (or in some cases all) breeds of dogs. 

From your pictures, it doesn't seem like anything is in immediate danger, and like Marcus pointed out an engineer is going to recommend you bring the entire house up to code, which I guess would entail new footings, columns, and beams. 

I am still getting to grips with the buy to let issue tax wise but my understanding is if you are domiciled in the UK, a US property using mortgage finance and not in an LLC gets dragged into the UK tax code which can be dangerous for high earners

-Well the deal you think you found under 400K more than likely needs a 100K+ renovation...if not then the house is in a dangerous area.

Some operate with dangerously low staffing levels.

Without having professional advice on this front, you are putting yourself in a financially dangerous situation.Also, this seems a fairly complex structure. 

Ther has been an explosion of gurus selling courses pushing multi family.