Missoula has seen more than $1 billion worth of public and private projects developed since 2013, an unprecedented expansion that’s causing growing pains for many as the city struggles with a severe lack of affordable housing, rising property tax bills and a workforce shortage. The building boom has been good to some but not as good for others, so city leaders will be on the hook to make sure Missoula grows in a way that benefits everyone on the socioeconomic ladder.