If it is not going over the road a long distance, there should be no real need to purge.
Clean the capping station and the stainless rim around the head and wet it all with cleaning solution to ensure a good seal. If you have the headlock that shipped with the machine you can lock the head in place. If not, carefully foam and tape the head so that it stays on the capping station.
Personally, I would take the carts out while taking it out of the second story and put them back in when it is down. You dont want them out for 48 hours, you could dry the ink in the needles, or worse.
I would want to plug it in as soon as possible, clean and nozzle check.
If it is actually going on the road for more than an hour or so, purging is recommended.