Even using a realtor that just runs a CMA can be misleading if that realtor does not know how to properly filter to homes that are similar to yours. 

The red stain is probably iron from the water.

Is the park on city water & sewer?

Dora over to Sanford/Lake Mary which traverses some ecologically fragile lands with very well thought out design (elevated sections for wildlife underpasses, a lengthy span over the Wekiva River to have no pilings in the water at all, etc).  

BP familia,I have 8 acres of land (inherited near Smith Mountain Lake VA) with an old MH on it with a well and septic tank (i maybe able to hook up to city water $$).

Look for sold comps on redfin as you can filter by how long ago they sold, try to stay within six months, pick similar properties and average, if you want to be more accurate make adjustments for different features and finish levels.

What would be a good way to understand the average electricity bill, water bill etc?

A capex budget needs to include but not limited to: roof 25 year life span, floors 10 year life span, appliances and hot water heater 12 year life span, hvac 20 year life span, bath and kitchen remodel 20 year life span.

Condo was vacant for a few years but we were pleased with the condition and amount, or lack of, active mold.as I said it was  total gut.Our Renovation includedHVACHot Water HeaterCeilings strippedMouldingFloorsCabinetsTileVanitiesToiletsetc...  

I am a Realtor with Keller Williams On The Water on the west coast of Florida.