I have the chance to get a small chest freezer for next to nothing. What will be the best use of it. 1 to controll fementation temps 2 to make into a kegerator?
Kegerator. Dual purpose. Use it to ferment between kegs. You'll need a temp controller. You'll also need the hardware for a kegorator. Get the stuff you mount vertically. Then you could eventually get a cheap frige off CL and make a kegerator and have your freezer as a ferm chamber.
Ditto on the ferm chamber first. Old fridges make great kegerators and they can be had for less than $100 if you keep an eye on CL. They don't need temperature controllers to keep kegs at serving temp, you can mount shanks/faucets right through the door with no worries of hitting coolant lines and they are designed to run at "fridge" temps without any of the condensation issues that plague 40*F chest freezers.
I have a 7 cu ft freezer that I was going to use for a kegerator and chamber but there just isn't enough room for both. Now I need to decide if I want to buy a fridge to use as a kegerator and use the freezer as a ferm chamber OR build a ferm chamber using a dorm fridge.