There is NO WAY you are going to permit your husband to take it down with his new chainsaw. Those dead branches fifty feet up in the oak tree need to be trimmed as well before they fall on the garage. You then proceed to call an arborist out. There might not be a charge to get a price for the work if the arborist is located near you. You might be charged if it requires a long drive to see your job.
Some companies now have a small charge to cover the costs of the estimator's time and gasoline.
Always try to get a referral from someone who knows the contractor. If you must make calls to a contractor you don't know, get referrals from his most current jobs. Talk to the person over the phone and have your pad and paper close by with questions you intend to ask. You might not want to deal with a person who is discourteous over the phone. Many arborists will not immediately return your call because they are out in the field.