What do you mean by 'Maintaining my website'?
Maintaining your website is the same as maintaining your car. Your car needs regular oil checks and air in the tyres. Sometimes it gets a puncture. Sometimes you may want to change your windscreen wipers. A website needs just as much care. If you do not keep your software and plugins updated they are vulnerable to viruses or malware. In rare cases it may get hacked and need to be restored from a backup. And of course you will want to keep the content current.
All of this can be done by you except the restore if the site goes down. Its a very simple process and is outlined in the user maunual. I recommend checking for updates every few months. However you may not have the time or interest to do it and if this is the case I offer maintenance for a small price.