Most sedans made today, the average max carry weight of a sedan is 900lb. And even at 900lb you fuel economy and performance is far less than "just fine."
Also cargo weight distribution is far different than people, with the lion share of packages being placed in the rear have of the vehicle and not evenly distributed amongst the front and rear axle.
1000lb of cargo is a lot to ask from any sedan and expect it to do it 8 hours a day, 6 days a week for 20+ years, isn't something I think you would find possible.
Most sedans made today, the average max carry weight of a sedan is 900lb. And even at 900lb you fuel economy and performance is far less than "just fine."
Also cargo weight distribution is far different than people, with the lion share of packages being placed in the rear have of the vehicle and not evenly distributed amongst the front and rear axle.
1000lb of cargo is a lot to ask from any sedan and expect it to do it 8 hours a day, 6 days a week for 20+ years, isn't something I think you would find possible.