Ok, so average subruban house probably like 20-25 minutes of mowing and 5-10 of trimmming.
So, you could get a very good walkbehind for 1000$ that will be commercial grade. I have a YBravo 21". No very known, but very good! Bulletproof tranny, extremely fast in second gear, very good at mulching and bagging, one of the bests to mow in very wet grass, it has real tires, ball bearing wheels and the lits goes on! It is also lighter than the other commercial mower outhere. Other very good models would be the Ex-Mark Z-series 21"or Honda HRX. They can be acquired for about 1000$.