You will likely see a fairly standard band of costs for comparable services.  

Home365 quoted me by phone last week 7% monthly management fee and 50% placement fee for their "Standard Plan," but their WRITTEN Prop Mgmt Agreement actually lists many fees and limitations.

Definitely wouldn’t do a standard 3/3!  

By carefully balancing the collateral and ensuring rigorous underwriting standards, it is possible to mitigate potential downsides while capturing the upside potential, providing a compelling investment proposition in a competitive market.Uses of Mezzanine Debt CapitalMezzanine debt can be deployed effectively in several ways, including:- Liquidity Provision: Providing liquidity to set aside interest reserves for first lien lenders and tax and insurance escrows required by the first lender.- Property Improvements: Funding additional property improvements such as renovations, HVAC work etc.- Operating Shortfall Coverage: Addressing operational shortfalls during challenging periods.Objectives of Mezzanine DebtThe primary objectives when using mezzanine debt include:- Project Stabilization: Completing renovations, construction, or improvements and then stabilizing the property with 90%+ occupancy.- Interest Rate Management: Buying time until interest rates normalize or decline.

Not only is the demands of each buyer going to vary by market and submarket, but also asset by asset.My favorite example of this was an old season of Flip or Flip, where they bought a house in LA county, versus their standard stomping grounds of Orange County.  

Instead of needing to meet DTI, income, etc qualification standards, DSCR loans qualify based on the asset itself.

Scenario 1: 5/1 ARMRate: 5.675%Monthly Payment: $5100Prepayment Penalty: 3/2/1Closing Cost: Broker Fees: $11,016 (1.25%)Lender Fees: ~$2,000Loan Fees: $600Plus standard title and other feesScenario 2: 30 year fixedRate: 7.375%Monthly Payment: $6086Prepayment Penalty: 5/4/3/2/1Closing Cost: Broker Fees: $11,016 (1.25%)Lender Fees: ~$2,000Loan Fees: $0Plus standard title and other fees5/1 ARM looks attractive but not sure if that's what other people opt for that for a STR property? 

Notice I didn’t suggest that max retail value is the standard. 

Their amenities are standard.

Generally most people you speak with are going to provide you a quote with their "standard" commission built in and anything less would be them taking a reduced commission to win your business.