I have a bit more stuff - but here is what I've done:

First go through an exercise to sort everything into four piles: (1) things to throw out, (2) things to sell/donate, (3) things to store and (4) things to take with me. Take a good look at pile #3 since you might not really need these things and might be cheaper to replace than store and at pile #4 .

I've done three different things on my longest trips:

When I left for 12 months, I put everything I owned into one bedroom and rented out my two-bedroom condo as a one-bedroom to a good friend. Gave her a good rate and she also took care of mail as necessary.

When I left for 10 months, I had a duplex. One half was rented out and I left my stuff in the other half.

When I left for 6 months, sold my place and put everything into storage units.

I am now going through the sorting into piles exercise for an upcoming extended trip. This next time I will put everything I have left into a storage unit and rent out my place. Financially it makes the most sense and also good to have someone living there rather than vacant.