Custom turrets are built around a certain elevation and other weather parameters. Change one variable and your turret isn’t accurate anymore.
You don’t really need a Bluetooth rangefinder that syncs with your phone either.
If you’re on a budget, just buy whatever rangefinder meets your needs that will give you the angle compensated distance. Shoot your rifle out to whatever distance you plan on shooting and create a drop chart that can either be saved on your phone or taped to the side of your rifle stock. Then, range, dial based on the chart, and shoot. Of course you will still need to know how elevation, and other weather conditions affect your given load.