Proposed Ford Falcon as Tow vehicle

[drep]

We intent to buy a light weight Caravan with a mass running order of about 1500 kg and a fully loaded weight of around 1800kg.
The tow vehicle we are considering is second hand dual fuel Ford Falcon 2006-2008 with up to 100,000 km on the clock. I am on a budget of around $8000-9000 and consider a Ford Territory to expensive.
Should we buy a sedan or a Wagon?, is there a difference in fuel consumption between a sedan and wagon?
As a dual fuel Falcon would be a vapor gas injected, could the gas system be upgraded to liquid gas injection? If so any ideas of cost and if it is successful.
Would it be worthwhile to have a transmission cooler put on and any other suggestions to avoid overheating would be appreciated.
Was told a Falcon BA is low and can wipe out front by hitting a standard size kerb in a carpark just by parking and rear can bottom out. Any ideas or suggestions?
What type of tyres would be suitable for long range towing?
We intent to buy a heavy duty tow bar, we believe the Falcon is rated at 2300kg, any suggestions on tow bar make and model would be appreciated
As there are a number of Falcon models what model Falcon should we go for?
Thanks