You can appraise the property "as is". The cost to cure, however, is probably not the right approach for a number of reasons. Chances are good the cost to cure the subject (bring it to full functionality) will be much less than the affect on value that its present condition has on marketability. To put it simply, if you were a buyer, would you discount the cost of completing the work in progress from the sales price? Probabloy not. You'd probably want an additional discount for taking on the risk, time, and effort (that's called "incentive").
Another mistake some make on "cost to cure": The cost to cure adjustment does not change the as-is condition of the subject. If the subject is a "fixer", then it gets a "fixer" rating. Adjusting for its "fixer condition" in some other area (like, functional utility) does not change the "fixer" condition of the subject. So, be careful about applying a cost to cure adjustment and assuming the adjustment makes the subject "average". It doesn't.
Lastly, even with the C2C, there's still this issue: At the bottom of page 1 of the 1004, the question is asked, "Does the subject generally conform.... to the neighborhood?" I would argue that a home with a non-functional kitchen and bath does not conform to the neighborhood (unless there are communal kitchens and latrines located throughout the area!).
Homes like your subject are sold all the time, so the question isn't if it can be appraised. It can. But, it probably does not qualify for an A, B paper loan. So the key for the appraiser is to make sure the report isn't misunderstood in what exists and how its condition impacts its value.
Remember, there are two reasons a lender wants an appraisal:
A. They want to know what they are lending on.
B. They want to know how much it is worth so they can decide how much to lend.
If what exists is not something they want to lend against, then the value is moot. The property doesn't qualify for any loan "as is". My advice is to make sure you accurately present the property "as is" in your report, and they credibly analyze how its "as is" condition affects its "as is" value.
Good luck!