The sport pilot certificate was created by the FAA to allow a streamlined path for those wanting to learn to fly quickly but with a few limitations. This is typically the lowest cost route to learning to fly but carries with it a few key limitations: no flying at night, two person airplane, aircraft under 1320 lbs, and restricted from flying in poor weather. 

An advantage to the sport pilot license is that a medical exam is not required.

Summit Aviation has 2 aircraft : 

The Ercoupe ($80/hr includes fuel) - limits the pilot to aircraft without rudder controls

The J3 Piper Cub ($79/hr includes fuel) - has the advantage of including a tailwheel endorsement.