A couple months ago, I started considering real estate as a way to supplement my current income and build long term wealth.

If you dislike your current agent and don't intend to work with them any more, then it's a moot point.If it were an off-market deal agents can often understand the nature of that, but when I have had clients go through the listing agent in order to save money on the commission (which almost always is shown to be a non-reality once you see the settlement statement), it has clarified to me that they don't need OR want me to labor for their best interests.  

I'm just getting started in real estate investing in the Nashville Tennessee area to supplement my retirement income. 

I have also been able to rekindle the dreams of that 10 year old, and I cannot imagine for myself a more exciting and naturally appropriate vocation.Thanks for reading and I look forward to collaborating with you all.Rich

Its human nature.  

I have been working with buyers and sellers, but would like to focus on performing BPOs for financial institutions, which will help me supplement my income between closings.

If I show them 30 properties and write 5 offers,...then when they finally get one property and use a different agent..well they have just wasted a lot of my time I could have been putting to better use.Now I have other investor clients who work with other agents and the nature of those relationships is different.

Taxes are the nature of the business, but it will give you a huge leg up against the competition because you have the cash to close on more deals. 400k today is worth more then what could be. 

The key is get familiar with the management tools your servicer offers first, then look to supplement your administrative needs.  

Do you want to continue to work and have the 600k supplement your current lifestyle?