As I accumulate, I have been thinking of buying another HW and storing it in a vacation home, just like the seeds, in the same way, written down and hidden. It would be about handling half of my holdings at each site.
What do you think? I don't think it would make sense, for example to have copies of the seeds of both HW's at both sites because in a $5 wrench attack I could lose everything.
If I were you I don't want to buy many HW for just to keep my holding. So, if you have a safe place and safety to write down the seed then you just have to think how to keep the seed safe to restore it to HW if you need it. HW is just media or agent, you can easy to swept and reset it into the new or old seed in every time.
You can create a new seed on the old HW, generate an address and send the fund then reset it. You can repeat it many times as how many you can split the holding.