My nature is pushy, but that’s not my intent. A couple more thoughts.
110/220 single phase is not rocket science, not hard, not complex. You can buy outlets for less than a dollar each, you can buy boxes for a dollar and a half, etc. The panel cost a little bit, and the copper wire is never getting any cheaper. It’s a whole lot easier to do before you put a lot of stuff in the way. The outlets and switches are so cheap, I would never buy anything but new. On the wire and the panel as long as you just inspect it (a common sense inspection), and it’s not damaged, take the break.
Having said that, put in twice the size panel and twice as many outlets as you think.
As far as the offsite rental, my two cents is to get rid of it. I rented one many moons ago for a period of five or six years. I used very little of what I stored offsite, and when I finally got rid of the rental, I threw most of it away. I could’ve easily purchased anything I actually did use out of there brand new five times over for the amount I paid rental.
Ditto putting stuff in your attic or your basement. I got hit in a tornado in 98, and everything I put in the attic got carried straight out to the curb for disposal. If you have a box in your hand, and you’re heading for the attic, or the basement, or thinking of storing it in a rental, carry it straight out to the curb.
my two cents, hope it helps