I put the opinion "commissions have always been negotiable" in the same category as Henry Ford's famous statement of "you can have any color Ford you want, as long as it is black."

Since the LTV on the hard money loan is high , I would personally purchase it using a bank statement loan at 85% LTV (15 percent down) and, as you mentioned, just use your cash for the rehab.

I've had them long enough to keep pushing up rents so that I am at the top of my niche, but know not to exceed it because I'm just about at the point where if I raised rents another $50-$100 I'd be crossing over into the lower end for larger units.

The major point to that statement is anything else but cash in your hand is speculation.

With the limited access in Yardi, you won't be able to adjust account trees and create multiple customized financial statements. 

For larger accounts with PMS integrations VRBO is a passthrough and we are the merchant of record. 

Would it be buying more of the same type of properties or expanding into larger properties?

Some of the larger companies will take them, but they often charge a fee.

Network in person, see if they have a publication where you can post your deals and what you are looking for, and if there is a larger annual conference for investors locally consider getting a vendor table to talk about your business and what you are looking for.

Feel free to inquire about their staff qualifications if it's a larger organization.2.