How to know what work should go into a property

[Josh Fenton]

Hey guys,

You here stories all the time about how people put so much work and effort into a property. Sometimes its done as a flip, or just so the property increases in value. My question is, how do you know what work needs to go into it? For example, if someone buys a property and they say once they buy it they're going to put 50k of work into it, how do you know what work should go into it?

I hope this makes sense. Thanks guys!