Please take a look at one of Cub Cadets brand new Zero Turn offers in 2019:
https://www.cubcadet.com/equipment/cubcadet/zero-turn-riding-mowers/ultima-series/cub-cadet-zt2-50-rzt-17RIEACO010
This is honestly the set up I have been looking for when taking into account the PRICE, deck size(50")...