Brother, get your car insured. Advise your father. He has already spent over 1.8 million, he MUST not think of saving a few thousands.
My personal experience with Chartis (New Hampshire) is very comforting. Its been two years almost, and I have applied for a couple of minor claims (around 10k). People there are very cooperating. I never even had to get my ride surveyed or inspected. Got my claims within 15 days.
Select any big name. Efu, Adamjee, GI, all are ok. But without insurance, you are in great danger of losing your 1.8 million.
Think about it.