Quick word of advice, look for land with obvious signs of infestation/damage, they are more likely to lead to a positive result. Always be polite, even when some miserable git tells you to fork off. Have a business card made (cost about a fiver for 200 online) and give it to whoever you ask, even if they say no. I have had calls from people who originally said no, asking me to come and sort their rabbits out.
Like everyone has said previously, eloquently or not, shooting land comes to those who actively search for it and you WILL get more knockbacks than success, ride the storm and k