Call a pro pest company, not BillyBob in a pickup, and have them locate the dead animal and remove it.

Please feel free to call me or contact me and I can pass on what I have learned.

@Michael Newman,I use these sources:current T12 & rent roll (if available)comparable rents from broker's OM packagecomparable rents from neighboring properties (MLS, rentometer.com, umovefree.com, calling to the property)expenses provided by management companies that have similar properties under managementexpenses (ranges) from NAA survey - usually outdated but give a 10000 ft picture and helps establishing some baselines.

Give me a call.

A contractor friend go certified to do on call inspection for the city/county and would do property inspections.

All of the turn key places i have looked at call themselves turn key but they require me to purchase the property and wait for 2-3 months while the property gets rehabbed and tenants found.

Its called the Deal Maker session.  

Realizing this type of rapid appreciation (or "forced equity" as some might call it) often requires a distressed or very poorly managed asset where a buyer can quickly and efficiently add value, raise NOI and convince a lender to finance the asset at the higher value.

@Kristina Modares This post looks a little old, but feel free to give me a call if you still need contractors.

Also I'm a member of an organization called BOMA - Buildings Owner Management Association.They have several building owners and have a very active community.