I disagree with @cptofthehouse . MANY schools are need blind; probably most public Us for one. They will accept people and the cost is the cost.
Why do you think there is a “low income plus factor”? That is certainly not listed in the Common Data Set as a factor of interest. Certainly there are some colleges that have specific low income outreach but those I know of are related to location (like inner city). And GCs can put in their LOR what challenges students have risen above for their achievements.