Cheap flights to Bulgaria

At the moment the cheapest standard flight is by Bulgaria Air http://www.air.bg/  from Gatwick to Sofia at 10.30 most mornings (check with your travel agent) at around 199 Euro return. British Airways fly from Heathrow and sometimes have special offers. Perhaps the cheapest way is by charter if you can secure a flight. Balkan Tours fly direct to tourist destinations and you should check with them.

How foreigners can acquire ownership rights on land in Bulgaria? 

Foreign persons can acquire full land ownership rights, including ownership rights on agricultural land by registering or joining a company incorporated under the Bulgarian legislation. These circumstances must be entered into the Commercial register of the relevant district court.