For this desert gambling town it could become an odds-on favorite: Inflatable space modules. With company facilities spread out across some 50 acres here in North Las Vegas, Bigelow Aerospace is bankrolling big-time the private development of large space habitats. Extensive work is underway in designing and building partial and full-scale inflatable modules, fabricated to serve a range of users, from bio-tech firms and educational institutions to other groups wanting to churn out made-in-microgravity products.