ROI question

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I am making repairs and updates to my deceased mother-in-laws home so we can put it on the market,we are having a new roof put on,paint,carpet,faucets,etc.The big ticket is the windows,the cost to replace them would be around 5K.What kind of return can I expect to get.Also,it has no dishwasher and no rear access to the yard,how big a problem are these.