Can you by-pass the normal real estate sales process ... via direct purchases ... it is possible but often only in bulk purchases. If you have inside information maybe a better chance. You will need deep pockets to pursue this avenue ... in 20 years of real estate very few are successful in this avenue. Some Lenders may be precluded via government regulations from doing this.
I understand the thought process your going through cutting out the normal cost ... these bulk purchase are usually only of properties they can't sell normally they bundle to get ride of the junkers.
Your best avenue is to get a knowledgeable Realtor and pick properties carefully make sure you know what actual rents are being collected and what it takes to get those numbers.
After 20 years of working with investors ... Last word don't get greedy and try to get rich quick, leads to bad business decision.