Last check renting a tux was a few hundred dollars!  Pick a suit or tux that you can have your groomsmen actually buy!  There are plenty of options out there that as long as you pick one that is the color you want and regularly stocked (don’t you dare pick a clearance one that doesn’t have all the sizes), your groomsmen should be able to just pick their sizes and have it shipped directly.  Don’t know your size…go to any department store and they can get your measurements.  Added bonus once the wedding is over the wedding party will all have a spiffy new wardrobe!