Look up the GVWR and GCWR for your vehicle, and then look at the payload capacity. Look at the existing load range on your tire, and decide if you are going to drive it with a trailer in the future or not.
There are used tire places that you can go to in Reno. Check and see how long they have been in business. When you enter the shop and look at tires, inspect every inch and on the surface. If the used tires have a warranty remaining on them, that would help.
Other than going to Big O, Les Schwab, Discount Tire or other places here in Reno, there are places on the internet to get tires. I was in the Tahoe-Reno Industrial Center last February, and I saw that TireRack has a distributor facility there. TireRack I have seen advertised in a lot of automotive magazines. They also sponsor a driving academy for teenagers, check into that.