@__stets__ wrote a SaaS product because he wanted to get Uber Rich...here is his story of why that didn't work.
If your thing takes off, you can always hire for better later.
You might want to sell your SaaS later on and having things together will make it a lot easier.
Back up your database, monitor your service and keep an eye on things.
Give customers good support. It doesn't have to be quick, but make expectations clear between you and your customers.