There are 3 oak trees that need to be removed as they pose risks to personal safety and property during windstorm. The last windstorm (dec. 2019, AK) produced 120 m/h gusts. The quote is $6k due to complexity plus a crane will need to be utilized to accomplish the task. Is there anything else could be done?
Your question is a bit broad since you've provided very little detail about the situation, but hiring an arborist to guide structural pruning would almost entirely eliminate risk of blowdown.
We have large white oaks in our neighborhood, and they're rarely blown completely down, but they do tend to lose large, long, high branches in severe storms. Shortening or removing those would substantially reduce risk. Obviously there's still cost involved, but perhaps quite a bit less, and you get to keep some beautiful trees.