That mower does not seem like a bad deal. I do not know if you will be doing residential or not but I would recommend looking at getting a 36 inch walk behind, most gates are around this size so with like that 44" you would not be able to get into most gates. just my suggestion
I think a walkbehind will make you sore, weak, and tired. The best mower I have ever used was an exmark 52".. I own a toro 60".. but the toro and exmark 52's and 48's are extremyl versitile.. I can mow gullys out by the street where drains are.. I lterally can get the 52's everywhere.. they can fit thru standard gates if u remove the ultra vac.. Walk behind are horrible for bagging. If you want to be effiicient and have energy all day, get an exmark or toro Z. Mid mount.