Help On Pricing -- Whole house lighting

Does not answer your question but a couple of thoughts: (please just ignore if they don’t make sense to you)
Have you considered dimmers for some of your switches?

I see that you use many switches. Have you considered door sensors to activate the switches? E,g my light outside the front door turns on when the door opens after sunset…

Smartthings lets you control other things besides just your lights: garage door (yeah, I know currently not 100% working), water heater, moisture sensor, doorbell/mailbox/washing machine (using an acceleration sensor)… Most of these can be done with the standard Smartthings apps.