Sitting on $625K equity at a 3.7% rate — keep as a rental or sell?

Looking for outside perspective on a decision I've been going back and forth on.

Quick background:

• Built this house myself, originally planned to live in it, but outgrew it after having a kid. It's basically a high-spec new build at this point.
• Coastal CA 2/1 bungalow, conservatively worth $800K.
• $175K left on the mortgage, locked at 3.7% fixed, 20 years remaining.
• Renting it furnished to travel nurses for the past 2 years. Current tenants (great ones) move out in December.
• Nets about $1,500/month in cash flow after everything.

I've landlorded before with a different property and had a genuinely nightmare tenant, so I'm a little gun-shy about doing this long-term, even though this specific rental has gone smoothly. I'm also emotionally attached since I built the place myself and it's a few doors down from where we live now.

A few things I'm weighing:

• Whether the 3.7% rate alone is reason enough to hold, even with modest cash flow
• How people who've dealt with a bad tenant in the past approach screening differently the second time around, versus just deciding to sell and be done with landlording entirely

Not attached to a particular answer, just want a range of views before we decide whether to relist it or sell in December. Appreciate any input.