Takes a week to download the node data  It gets slower at the block numbers get higher.  Depends on your internet speed.  I found the node did the IBD better when I wasn't mining.  IBD uses a lot of cpu resources and any additional work by the apollo respberry pi seemed to crash mine causing download restarts.  1 TB nvme minimum for bitcoin database storage.   Probably an upgrade to 2 TB in about a year.  I've got a 128GB microsd that works fine for system files.  I used the legacy balenaetcher to flash the microsd fine. per futurebit support page.   I"m running v2.0.5 because it worked for me and v2.0.6 had bugs that crashed my system. Maybe v2.0.6 will work good for you. I don't have windows open on the apollo keyboard/mouse dashboard as that uses up more RAM memory.  I use it to start up, but once going I close the window and switch.  I monitor it remotely which doesn't impact memory usage.  If you can pay attention to the log file in the bitcoin directory if your system crashes.  You may have to restart the node several times and this process can take time as the bitcoind program rewrites database files.  Any interruption in this part of the process can crash the database causing a reformat and restart.  Once you get to at least half of the blockchain, stopping the node and backing up the database to a second 1TB nvme is a good idea.