The pilot reported that while landing at his initial destination, the right main landing gear partially collapsed. He stated that the initial touchdown was normal, and not hard or side loaded. Once the right main gear partially collapsed, the pilot aborted the landing and attempted to retract the landing gear; however, it would not retract, and the landing gear circuit breaker tripped. The pilot contacted a mechanic and attempted to troubleshoot the problem during the pilot’s flight back to his home airport. During the troubleshooting, the pilot attempted to utilize the manual landing gear extension without success. The pilot performed multiple low passes for the mechanic to visually observe the landing gear. The mechanic reported that the left main landing gear appeared to be almost fully extended; however, the right main and nose gear were in a mid-transit position. After multiple failed attempts to correct the landing gear problem in the air, the pilot landed at his home airport. During the landing, the landing gear fully collapsed resulting in substantial damage to the fuselage and the wing spar. Examination of the landing gear by the mechanic revealed that the left and right main landing gear push tubes were bent, consistent with the push rods being overloaded. An operational test of the landing gear motor revealed that it operated normally.