Your best bet is to plan a year or so ahead and get sponsorship in the queue so the spouse can enter with a green card. Timelines are about 8-14 months.

But as PRoberts said, a non-citizen spouse can't enter on a tourist visa with the intention to change status. A spouse can visit, but then change their mind while in the US.

But CBP is well aware of people trying to shortcut the process this way, so it can be very challenging convincing CBP your non-citizen spouse intends to leave. But it can be done showing a job, property or other elements that would require someone to go back.