You can literally change the market price of a property by millions with just a few percentage point change. 

There's not a good reason to not ask for the allowed rent, the tenants portion generally is based on a percentage of their income not a percentage of rent. 

- **Percentage of Profit**: Some developers or engineers might be compensated with a percentage of the project's profit or the gross revenue, typically ranging from 10% to 30%

I would assume your brokerage would not be able to afford to pay for the E/O it would cost you Most E&O policies will pay out 0%, or cancel altogether if 25% of the transactions are dual agency.

Are they flat fees or percentages? 

They need to analyze what can go wrong versus right and the percentage and probability of what might happen.

I am planning on 20% down , then a fixed payment based on current typical rates for the next 5 years, then a balloon payout at the five year mark.  

And I guess if your always paying cash and can hold long term that might be true.. but you bring in all these payouts up front and debt behind it and that creates the risk.

I would suggest looking to bring in a partner and give them a percentage of equity for the $.Another option is to take profits from flips to grow or look to sell some of your rentals to grow as well.

For example if you wanted to gift $100k to your child to purchase a business, it may be best to make your child manager, with say a 20% interest, while you and or your spouse maintain a 80% interest.  100% of any net income can still be received by your child as manger, or even for just his 20% interest, as profit allocation  need not align with ownership percentage in an LLC.