In a nut shell...I'm a Texan that went to HS in WI and college in IA and then spent that last 15 years in China (selling rubber, brass and the occasional gov procurement).

parrot,I've purchased 2 properties in the past year within my self-directed ira.

I procurred a buyer before the land even closed.

Not to sound like a Parrot, but @Michael King has the right idea here.

Looking for tenant procurement service only.

Also included on the list of activities that require a license are any attempts to lease property, any acts directed at procuring tenants for a property, the negotiation of leases, or advertising or holding oneself out as in the business of leasing property.

As for whether you'd be responsible to take out a loan if an investor puts 20% down; unless you have another means of procuring the other 80% - yes. 

In Nashville, where my other properties are located the typical management fee is as mentioned 8-10% of gross rents, however, what I do see a lot of variation in is the "lease fee" the percent of the first months rent to procure the tenant.

Then they might even feel entitled to a procurement fee anywhere from 100-half a month rent to a whole month's rent or more in some areas. 

In fact, I would generally avoid most multi-units in South Florida unless YOU are the procuring buyer.