As an equipment rep I've seen a lot of lightening strike situations. It is hardly worth trying to repair equipment in a home that has taken a hit. You may get the equipment to function, but there is so much happening in the equipment that frequently other components will give out, after you have either sucked it up and not filed a claim or settled the claim for less than you should have. I suggest "total loss" of all electrical/electronic appliances and gear. Pay the deductible and start over. You will be happier and you will know what you have.
The $3k seems a high deductible. I think mine is $1k. I have played the high deductible auto insurance game for years. Basically, you cannot afford an auto claim for short money so I max my deductible on the autos and after 3 yrs with no accidents I have a positive cash flow...sorta
On grounding. If you weren't there when the electrician pounded the ground rod in, it is worth putting in another ground rod next to it. Had a guy who was having all kinds of problems with a heater. I checked that thing up and down and was back a couple times. Finally, I went out with a wrench and put it on the ground rod clamp. Took an easy turn on the loose bolt and the ground rod flipped right out of the ground. Homeowner said, "well, I hit a rock." Today on nuisance outages of about anything the first place I go is that ground clamp.