Contact realtors who specialize in foreclosures (easy to find; go to your local multiple listing service (MLS) and scour homes). Also, acquiring institutions of failed banks are fertile ground... see an editorial at link below that talks about this ("How to Earn More Money in Your Foreclosure Cleanup Business")...
Also, investors, landlords and home owners associations are good contacts for work... of course, larger companies (property preservation companies) are solid contacts... (see editorial entitled, "How to Tap Larger Firms to Grow Your Foreclosure Cleanup Business.")
Property preservation companies take longer to pay, but you can land bulk with these companies, which can help put your business on the map... they tend to pay less and again, you will wait longer to get paid, but there are ways around cash flow issues -- using a factor. See article entitled, "How to Keep Cash Flowing Into Your Foreclosure Cleanup Business."
Again, visit industry link below that will guide you in all aspects of starting your biz. We've put out enough FREE info on industry... enough for you to read and be sure you want to get into our industry, before you spend money on any program. Sincerely, much success to you in Detroit ... :)
Cassandra Black, Consultant & CEO, Foreclosure Cleanup, LLC