Hi Bob....
I find this part of ALS to be one of the hardest and was afraid about it form the start. My husband has had ALS , diagnoseded 8/2004 and no voice since about 3/2006. It is amazing the signals you can figure out and adapt. Of course many people have voice synthesizers/computers to speak for them, but when laying in bed for example, sometimes it is hard to use the computer. We rely much on some eye signals that my husband has developed for different things...he may glance at the item, for example, and I first try and get the noun/subject for what it is about...I ask 'yes/no/ questions...is it about your temp?, is it about pain?, is it about toilet? and then when we get the subject I ask further...are you cold/hot...etc. --I wont say it is easy , but its works out for us in the end. There are many other techniques. People make boards with pictures of all the common needs and then the caregivers points to the different items and the PALs can blink or otherwise indicate that choice. For more specific needs there are alphabet boards and the caregiver runs their finger along the alphabet until the PALS indicates and letter by letter a message gets spelled out.
I will tell you that in some ways the stage you are at, where you are worrying about all that will happen to you is one of the hardest. It is amazing how we adapt to things...my husband never thought he would even want to live through all this, but he does find some joy in each day and we continue along. He has lost all except some limited movement of his head. He is on Bipap all the time but will not be going on a vent.
Where is your town in India? I love India--I have traveled to Calcutta and Varanasi, also Nepal.
Take Care, Beth