Adding another bathroom will improve the property value.

That is much more likely to be considered a capital improvement, at least in part. 

Alexander, I would recommend to talk to somebody that can figure out weather it's a deal or not first.If it is a deal and you have it under contract you can: shot a video of the house, post it on YouTube and add a link of the video on Craigslist as " handyman special" etcPut an ad in the local paper for $200List it in the market place on BPAdvertise it at your local REIA Title Co is a business that completes real estate transaction and records documents at the County.

The property card will tell you land value, improvement  value, how many years back taxes, etc.

How do you define "over improving?"

My question is other than Home Improvements Shows, which other ways of marketing are everyone else using that generate good leads?

Often next (or simultaneously) usually, but not always, some property improvements are in order.

I am also taking this time to improve the value and increase equity in my own house.

Bringing something to the table will massively improve your chances at the eventual mentor relationship you seek.

What other benefits result from the improvement.