One thing you should consider before you buy a home are the property taxes. Here are the approx. taxes in Dufferin County and Peel Region.
Taxes based on $400,000 property assessment
Caledon(Alton,Bolton) $3706 Erin $4,000
East Garafaxxa $4170
Grand Valley $5307
Remember there are other things that should be considered such as how the home is heated(gas, propane, etc.),Sewage (city, septic etc.).