Around here (Dallas TX area), most Walgreens and CVS stores, and selected Costco and Sam's Club stores process C-41 in the store (not send out). WalMart is send-out to Fuji.

If you can't find another local lab, then try #2. It's easy, once you figure out what chemicals to buy. There's plenty of help for that on this forum.

The chemicals for C-41 and RA-4 are not especially smelly. Have some ventilation in the room you process in.

I draw air into my darkroom through a light-tight darkroom louver that I installed in my darkroom door. I have an exhaust vent over my sink that vents to the attic, but it would be much better to vent to outdoors if you can. Make sure all of your ventilation is light tight.