The reason I want to do that is so I can get my feet wet without taking on as much risk.

Reason being is it could take YEARS for sub divisions to fill out.

I would offer help in any way I can (Within reason) yet give them their space.

Is there a reason for this?

There is a reason they used to call them wobbly boxes!

What is reasonable cost for these activities?

No reason you couldn't self-manage if you got tenant placement covered, especially since Omaha is fairly close in the event you needed to bolt over there.

😜That sounds reasonable.

The reason being that the majority (but not all) of property managers in San Francisco are pretty ineffective/perform poor quality work.

All of your properties are tied up and you don't have the flexibility you may need.So; yes they exist, but I wouldn't recommend using them unless you never have any reason to sell the houses and want to keep them forever.