- any underground utilities like abandonned well's or underground fuel tanks (often on farm land)- water and sewer availability- power and gas availability- internet availability- perc test (if you need a private septic system)- has the land been filled (loose ground, foundation issues)- any easements or encumberances- any other disputes with neighbors- access to road, curb issues- municipal mandates, like will they make you run sewer and water, build a sidewalk etc- municipal impact fees- always have a builder or excavator inspection contingency, so you can terminate if your contractor finds an issue

Should I wait to put in an offer until after they replace the roof and shingles or should I put in an offer now with the contingency they complete this work?

I'd say offer $75k all cash AS-IS with no contingencies (if you already know the extent of the rehab, this should be easy).

Nicer homes and rehabbed homes in my market are still fetching multiple offers and one of the first things dropped for the winning offer is the home inspection contingency.

Obviously you can't predict the the future so have a contingency plan.  

When you're evaluating different turn key companies, in general, the ones to avoid are the ones that: Don't allow financing or a finance contingency (it can be a good indication they are selling above market value)Don't allow for your own independent property inspectionAre not realistic with their pro forma's (i.e. they don't include vacancy or maintenance projections or use unrealistically low vacancy factors)Require you to pay for any renovation upfrontSell only in cheap. low end neighborhoodsDon't accurately represent the neighborhood/property classificationDon't have consistent rehab standards for all propertiesThe table below might help you evaluate some of the most popular markets at a macro level.

@Christopher KolasaIf I may ask, who wrote the contract on the loser deal for you without any weasels and or contingencies?

Or buy up near the base where you've got an ever-rotating contingent of military personnel. 

Only now it is off the market and you are the only bidder.Finally if I could give you any advise it is to do your homework and find out exactly how much it the property is worth, make sure your offer contains contingencies, that help you adjust your price in case of surprises, so you do not lose your deposit.  

I figured I might as well make an offer with a financing contingency and see if we could make this work.The numbers were close, but since they couldn't use 2017 income yet, the debit to income ratio fell outside their approval window.