I own rental properties under my name only. Can I pay my wife to for lawn mowing, snow shoveling, property management, or labor for repairs, etc for those rentals?

It might be possible, but when the CRA sees a husband paying a spouse, they will often audit those returns. And they will want proof, like her being on a payroll, or you billing her as a contractor. If you want to do this, it would be best to contact the CRA to get their opinion on how you should proceed with this.