There comes a time in a home building to step back and say, "No Way". As to the cabinets in the kitchen, I would obtain a filler board, all cabinet makers have them, for the right side. Use the filler board to force the right cabinet in to the window, leaving about a one inch reveal from the window. Move the left cabinet in also leaving a one inch reveal from the window. I don't think no amount of adjustment will correct the warped drawer. Oh yes, tell the contractor to tell the galloping hormone charged 25 year old to either get his hormones in control or just go play with the girl friend. Their are to many, way to many finish carpenters looking for work to have some hormone charged individual doing finish work in a house.
What is your mother going to do with her mixer, coffee maker, etc. Obtain a coffee maker, place a board on the cabinet top to simulate the counter top and call the builder and galloping hormones over and bluntly tell them they have one chance to slide the coffee maker under the cabinet. Some people do not understand being nice and equate that with someone that can be taken advantage of.
What is your mother going to do with her mixer, coffee maker, etc. Obtain a coffee maker, place a board on the cabinet top to simulate the counter top and call the builder and galloping hormones over and bluntly tell them they have one chance to slide the coffee maker under the cabinet. Some people do not understand being nice and equate that with someone that can be taken advantage of.