Hello I have been in the game 10 years. My opinion, you should have 1 commercial self propelled mower.
I suggest Toro proline. I have alot of big lawns very few push lots. I have been able to keep my push mower 10 years (Toro). Over the years I have tried toros home owner version and it was good for about 2 years. So I went back to the commercial and plan on keeping this one 10 years to. The cost was $1,100 The other two reisdentias I purchased were $500 and $450 both needed replaced after2 years.