Now that the cold weather has hit I've come to find out the heating system was done as a hack job that needs to completely get redone - and ASAP.  

More likely you may be at end-of-life for a roof, HVAC systems are about to die, etc.

What is a ballpark cost on a foundation for something that is 500 sq. ft. and then making sure it has a working plumbing system?

I'm going to over generalize but a property built in 2010 versus 1910 comes with a lot less issues. 

Not value, price based on what the current market says versus what else is on the market.

Currently finalizing details on a new construction home as my first rental. House is 148,000 with sod and sprinklers. 141,000 without. I’m planning on zeroscaping the front yard and for sure having grass in the backya...

They will then need to justify the use of triplex’s versus 3 SFR on a single lot in the appraisal, as there are no similar comps. 

It was a project started this decade where the city of Atlanta has repurposed an old rail system (out of use) and is putting in connected neighborhood parks, 10-ft wide bike, scooter, walk, run path, and a light rail system adjacent to it, all the way around the downtown area of Atlanta.

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That’s the difference a great manager and a great system can do for your property.Did I miss anything?