https://www.amazon.com/AmazonCommercial-Insulation-Tester-Multimeter-Function/dp/B07W1BKTHF, Amazon has some really good options for multimeters. I'm an applications engineer for a CNC oem so I spend a lot of time troubleshooting electric induction motors and servos for position control. This multimeter has a built in megger which is perfect for me. They have other models and you'd be hard pressed to find a better value for your application.