Effective property management starts by buying the right property.You can read my bio for a description of my experience.  

We also gathered things like the property address, the legal description and how much the original mortgage was.Next, we’d door knock all the “pre-foreclosures” being advertised in the newspaper.

That's a very specific legal description I know, but essentially it contemplates that you will be away from time to time.  

This is my rough estimate based on square footage and the description the seller gave me. (2800sq ft * light remodel $11/Sq ft for about $30,000)How should I proceed in making an offer?

Attached is 2 to 4 family units under a common roof line and having common walls situated on a common legal description.Detached  is a single family dwelling which stands alone, not attached to other dwelling units situated on one legal description.

They give a vague description and then say sign a CA with a NCND and blah, blah ,blah.

The more descriptive a lease, the better protected you are.

And of course this really all boils down to intent and your pattern of business.If you routinely act as a broker IE have a flashy website.. advertise on craigslist JUST LIKE  A RE broker with pictures and descriptions. appoitnments to show homes to prospective buyers . your going to have a hard time with this being a simple sale of an equitable interest theory..

i just use the good old excel sheet ha for take photo of receipt and recording down the date/amount/description.

Based solely on your descriptions, NO tenant of mine would be charged for those issues.Odds are, you will need to file a suit in small claims court, which is typically very inexpensive (under $50), and you are NOT required to have an attorney.