re: Do you see any Cities in Louisiana with a promising future?

Bossier exists solely to accommodate white flight from S'Port. It is symptomatic of the illness of the larger community. Just as W. Monroe is white flight from Monroe.
And Ruston exists to accommodate Temple Baptist and La. Tech (but only for so long as it is a SBC bastion).
None of these communities are very promising unless you want to evangelize your neighbors on their way out of town.