To get top dollar show when it's done, has staging and professional pictures.

You could always check with your tax professional to be sure, but I can't see why you'd need to issue a 1099 to the property owner in this case. 

Arrange for professional cleaning of the HVAC system, ducts, carpets, walls, woodwork, cabinets, windows, blinds, appliances, etc.

I would really like to know if you even know the German term for it as many real estate professionals in Germany have no idea about it.

If you are looking for business professionals that desire to be closer to work then downtown is good.  

NWA, if you haven't heard of them yet, is basically a professional wholesale company.

You can learn a ton from the real estate experts on the site.As for investing in the $20-40k range, I recommend that you find highly respected professionals like @James Martin and @James Wachob to be your "boots on the ground."  

One company is a property investment company, and the other company is a professional services firm (Architecture and Engineering).

You can also search NARPM.org for the RMP (Residential Management Professional) and MPM (Master Property Manager) certified.Paul

Another thing is to connect your clients with top notch professionals in the industry like title, escrow, attorneys that can add value to there business.