Congrats on your move to the water! my husband and I sold the house and moved to a 1971 Hatteras MY in Massachusetts
and so enjoyed our 5 years aboard.
Storage and stuff: You will not want your stuff after being in storage. Neither will your kids
. We had a single
garage size storage unit and doing the math for 5 years, it was ridiculous. Also, despite it being temperature controlled, we have moth damage to several rugs and had to toss them.
When you return, you will realize that you really didn't miss the stuff in storage. We moved to a small condo after our 5 years, and really enjoy the smallness of life without a lot of stuff.
We were super nervous too, but never regretted it for one minute...snowstorms on board were fun..... Heating
was super expensive, but we would do it again in a minute.
Regarding the post office box, we did a box through our local UPS store which was great, except for registering to vote and getting dog licences. They wouldn't let us list the UPS store as an address. I ended up using a relatives address for the dogs
and registered to vote when we were on the dock
in the winter. During the summer we were on a mooring
in our harbor.
Let me know if you have additional questions.