First you need to decide what fuel you want to use, electric, gas, pellet, wood/charcoal. Each has their own advantages and disadvantages. Electric, gas, pellet are easier to control cooking temperatures because of built in thermostats. Wood/charcoal will require more attention in order to gain proper temps, but usually give better products in the end. If using in colder outside temps insulation built into the unit is helpful in controlling cooking temps and fuel usage when using fuels other than wood/charcoal. I have a Masterbuilt electric smoker that does a good job (more like an outside oven) that I use for products with casing. For large chunks of meat (ribs, pork butt ect.) I use a Webber with wood/charcoal.
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Being married is work. Work is management and labor. We all know how well management and labor get along.