I think @Ryan Evans has a good argument about the broader Tacoma area, but there are still some pretty significant neighborhood differences if you go 30 blocks south, east, or west. I have looked at a lot of SF and MF properties from Lakewood to North Tacoma from the water to east neighborhoods. Personally, I don't love South Tacoma (around the mall) nearly as much as I like areas closer to Lakewood. There are some very good discussions from 6 - 12 months ago where the fundamentals haven't changed.
There is a lot of older MF stock that is clustered close to the mall. Malls in general are dying, and Tacoma mall is anything but a lifestyle center that is drawing new business or clientele. Funny how these cycles go as the mall killed downtown 30 years ago, now downtown is quickly coming back to kill the mall... Everything I have seen about demographic preferences indicate people want to be close to a neighborhood center, I don't see the zoning or population in the mall area coming around to attract a quality tenant base that allow differentiation between new construction over the older stock in the area.
Heading south you have stronger influence from Joint Base Lewis McChord and a lot of upgrades going on in local neighborhoods including University Place and Lakewood. Closer to downtown you have everything that Ryan mentioned. If you are still in the City of Tacoma, permits and construction costs are not much different between areas closer in and further south.
All of that said I prefer areas just south of hilltop (still a lot of vacant land on the hill south of 19th). New places like 7 Seas Brewery are going to anchor that area. I also like some of the eastside neighborhoods in South Tacoma. They have some rough edges, but the commercial districts are starting to see investment and land and houses are still pretty cheap. With a 12+ month window to get units rentable I think there are good bets there. Schools are still a challenge throughout the city, so family-focused units are going to be a tougher sell for a while.