Yes, any PM is going to have their mark-up, but they need their cut because they are dedicating their manpower/hours to bidding, communication with you, supervision, etc.

You have the man power and the experience of owing a small business already.

PM companies charge fees when they fill the GC role because they cannot devote manpower to manage your projects for free. 

We don't have enough manpower to market to individual homeowners, but I think we could handle it if we just focused on owners of a large number of properties

.), plus a way that you can send mass emails to everyone or to people in specific categories- shows you markets where housing prices are dropping the fastestMaking enterprise-level software takes a lot of man-power.

Everytime I ask a construction company to do the rehab they tell me that that don't have the man power to take on a job like the one I have.

There are numerous examples none of which they have the man power, batteries, or factories to produce. 

With a deal of this size bringing in a professional to help you will not only give you a second set of eyes but also increase your man power.

Most PM app companies simply don't have the manpower or clout for this.

What I have to offer is the skills, manpower, and license to do the work that would be needed to turn around a property and have it ready for sale.