Thank you all for your advice. ok so here is an "UPDATE".
first i am planning on purchasing this property cash. i know i will still have holding costs but it will not include interest on a note, which i assume helps. also my partner is a realtor, so fees are at least less if not none. (495 listing fee to broker)
secondly the investor i am looking to get the property from said he wants 85000 for the property. this comes with a dumpster, roofing materials, a sink and faucet for kitchen.(already delivered since he was planing on rehabbing this house.)
additionally i found out that the home as an unfinished room over garage FROG or UFROG fully framed but no finishings except power. this will raise the square footage by about 400 square feet. based on CMA per square foot this raises our ARV to 189000. the comp homes (6) have taken on average of 20 days to sell. they are similar size 2400sqft and less nice than ours will be. ps our comp homes are pulled from homes sold in the last 6 mo. there are more of the same (a little higher) on the market. obviously when they are sold the price drops a little due to negotiations.
finally, today i had a home inspector come look at the house. (thank you @j scott )he checked everythig. crawl space, attic, walked everywhere to check floor, electric, plumbing, air, heat, chimney, foundation, porch, driveway, code violations, etc... very thorough. he pointed out a few things i did now know. i have alot of contractors in my network, many of who i consider "friends" and have helped in some way or another, so i called them to get a quote and their advice on the project.
we sat down tonight and addup costs of rehab. downstairs duct work, roof labor, tile, carpet, laminet, paint, minor landscaping, foundation work (previously quoted), drywall, fixtures, adding ac to FROG, etc...
OUT TOTAL CAME TO 35000 WITH A LITTLE FLUF!
i am sure we missed some stuff, but am confident we did not miss anything huge that is inspectable by inspector. this gives us room to spare i believe...
What ya think now?