I have been searching all over the internet for some ideas of what to do with it (as reasonably as possible) and while I am finding tons of info on interior rehabs, I just can't find too much for the outside. 

The potential downside is that if the landlord is walking away he or she may have quit collecting rent, so you may have a tenant who has become used to living for free.I have never had a potential tenant in this situation ever not let me walk the interior of the property.  

I specialize in kitchens, baths and interior finishes.  

-- story I got was that around 8-10 years ago the homeowner was replacing the roof themselves and a tremendous storm/downpour soaked the inside of the house/all the interior walls and mold started to grow.  

Joey, You looking for an interior designer? 

Siding, windows, roofing, heat systems, exterior, Interior painting, landscaping, parking lot, new appliances, etc. 

:-Pand what about interior wall colors?

It is anywhere from 4-8 bedrooms depending how you look at it 4 full bathrooms two living rooms a formal dining room and kitchen. 3,800 sq ft of living space and a front porch and a two story rear porch with a private master balcony.Purchase price: $15,000 (yes 15 haha I could not believe I won't he auction that low it does need a ton but still)Reno budget: $70-90kARV: $200,000 ( this might be conservative as two fully Reno homes on the same street just sold for $222,500 and a good friend of mine paid $250,000)These are the only two Reno homes in the area fully done mine will be the third but this is where everything is expanding to and the city is determined to make this area great again so hopefully this can kick start me into getting in on the ground floor ESP with the support of the historic society and the local NHA.I will get more interior pictures soon as I am meeting with the lady from the newsletter Sunday for a photo shoot and interview.Wow that was a long post if you managed to hang in there and read it all thank you.

He said the last offer was a full price offer, but requesting the seller to do new exterior/interior paint and new carpet.

This is the odd part: The first listing on Hubzu showed it with the OCCUPIED status - you know the one:  Don't bother people in the house; no showings; must buy without seeing interior.