I need someone to examine the user interface of the online system I created for real estate agents.

This is quite simple with screenshots and Photoshop. If you are bootstrapping, try resources like fivrr.com, elance.com, or odesk.com Otherwise, ask your friends/family/neighbors if they have a copy of Photoshop for you to do this. If you'd like, setup a call and I can have my in-house designer do it for you.

Yeah they should...user meta and groups also an option

Go onto https://dribbble.com and scour the place for quality design work. Once you've found some great pieces, look at what else those designers have done. If their portfolio fits well with your requirements, contact those designers and tell them about your project. Avoid sites like 99designs.com and oDesk in my opinion.

We have been collecting usage data on the home button from about 750 websites we manage across North America in an effort to try to determine if it is necessary or not. While each website is different, and much of the data is statistically insignificant, we have started to operate with a few assumptions. 1.) Most users, particularly younger users, recognize the logo as a way to get to the home page. 2.) Websites without home buttons seem to get a comparable amount of traffic to the home page as those that do not. We don't see a significant difference between having a home button or not. 3.) Websites without a home button often will see an increase in direct traffic from returning users during a session indicating that users who do not know the logo is a route to the home page will instead clear the address bar back to the root domain to get back home. Based on our research, we have decided to omit the home button in most instances. Although when it is present, it is often used, most users seem to understand how to get to the home page regardless of the inclusion of a home button. With the complexity of modern websites, we are usually pressed for space in the header and can better use the real estate that would be dedicated to the home button for other UI elements. That said, if the audience for our website skews older, we will still include the home button. Our research has indicated older users are less familiar with the concept of the logo being a home button.

There is no clear call to action on the site. What do you want a visitor to do? What's the primary goal, the secondary goal, etc. Additionally there is no value proposition. Yes you have reviews but so what. If I am the ideal customer why should I do x goal? These 2 elements will have the biggest impact on conversion, not color or anything else.