Real Estate Calculator How Can I Add Real Estate Tools To My Website?

How can I add real estate tools to my website? - real estate calculator

I am building a website for the company of my husband. www.tobarhomeloanservicesinc.com is a real estate site, I will be interesting tools, such as a mortgage calculator, a search of properties on the market, a tool for checking the composition of ownership for customers know the value of their property, a profile of the average wholesale and retail trade, etc. I found some sites that mortgage and rates, but for the viewer based on your site that do not clear. Do not worry about a fair price to pay just do not know where to start. HELP