I think I have about the same number of motorcycles but haven’t ridden due to less than stellar health. But hoping things improve in the spring. I only renew tabs when I actually use something. WA just started requiring liability coverage for motorcycles and I will purchase (maybe) if I start riding again. There is no linkage (so far) with insurance. The vehicle registrations here are all around $100 unless the GVWR is higher than normal. Some of the bikes have vintage collector plates and don’t need renewal.
The lack of use derives from working 70 weeks and a limited riding season in Idaho. What little time off I have is spent with my wife going to dinner or doing household shopping on a weekend. In San Diego, I rented a room so I could work a contract there. The motorcycle was ridden daily to work and on weekends. 50 to 60 hour weeks, but responsible to cover all my daily living needs e.g. shopping, laundry, food. I would call my wife in the evening after dinner. 5 years of that with just 2 weeks home each week.