What can I get to alert me to:-
1/ wallet updates
2/ MN failure
?
Wallet updates, please join the email list on the first post of this thread.
for MN monitoring, moocowmoo has made an excellent tool, just don't know exactly where it's posted (github download) or you can go to DashWhale, where they have an easy interface and email notifications if your node goes off line.
Finally, you need to put in cron jobs to check on the status so that your node automatically restarts if it should crash. Again, I think moocowmoo's script does all that for you?