You won't get a decent new diesel for that money - don't get chinese. You could buy a secondhand one but be careful what you buy. I've just bought a diesel to replace a 13hp honda with a worn pump as it was costing a fortune in petrol. I bought a 14hp water cooled twin cylinder, 21 ltr/min @200 bar and its quieter than the Honda - the saving on the fuel will pay for it in 100 days of washing at todays prices. Buy nice or buy twice