I have many ideas…
In the entertainment sector:
A good indoor go-kart venue + an outdoor karting track. Add food places such as Raising Canes, etc. and you will kill.
Long-term, expand to more food and possibly a real track for cars.
In the tech sector, 2 ideas:
There are a few mobile app developers in town but none offer truly turnkey solutions to quickly deploy apps. Make several frameworks to support various industries (such as the event industry).
Data recovery for hard drives. Anyone do this in town? Could be a lucrative niche.
Service sector:
A quick but somewhat high-end detail shop that uses safe, modern techniques and can turn over cars quickly.
Ever hear of Delta Sonic up in the Northeast? They don't franchise out but they are ripe to have someone copy their business model.
http://www.deltasoniccarwash.com
Serious potential there especially if you can segregate your place as being safer/better than all the hack-shops/dealers in town.