I think a comfortable distance between the island and the counter is around 42". It seems that you have only 30" between your cook top and the counter. I might be a little too tight. The wall between the entrance and the kitchen could be 4' long instead of 6', you would then be able to move the island a foot which would give you more room between the cook top and the island. Could you switch the location of the toilet and vanity in your dad's bathroom so your enter facing a vanity instead of a toilet which is a lot nicer.

Sorry, but would you really take advice from someone that hasn't seen even off color photos of all the materials you've selected or knows the floor plan of your kitchen. If you post photos of the color and door style of the cabinets and cabinet moldings, a photo or the the name of the coutertop (there are many types and styles of black countertops), the finish and style of the appliances, the flooring you have selected, and the floor plan of your kitchen, maybe you could get sensible advice along of course with a lot of less valuable input. Asking blind strangers to direct you isn't sensible.

I had purchased hafele hob 10 months back... I got it serviced 6 times... Now i requested for replacement with new one... Still they have not attended my request...

acc to ur kitchen cabinet pic, I would request u to get stone ( kadapa ) vertical base frame and on top before granite fitting and then wooden panel can be done for drawers n shelves. this will eliminate wood to get wet and start to fall apart. looking forward to modular version need to know it last few years only. wherever water is concerned only wooden panels won't work for longer n steady use. for counter tables or side working space that will work but not where the sink will be placed.