if a 54 is to big you might want to check out a 36" stander. I used to have a 54" ztr and 48" walk behind. I switched to 2 36" standers and I can knock out some lawns now. If your account are smaller than 1/2 acre you cant beat the smaller standers. A 36" stander can cut as much grass as a 48" stander in an open field, but you can fit into smaller gates, around trees, over humps in the ground, and with the 36" you dont scalp nearly as much. I can cut 20-25 lawns in one day with one helper and one 36" stander. Check them out.
Make hay while the sun shines!