I definitely think that this is an idea which has a lot of potential, it might be good to consider this kind of approach not only at the time of vote, but also at the registration phase, because that is actually another obstacle for people in the election process, then it will be possible to have accurate information of what are the disabilities and where exactly they are.
Continuing investigating I also found that in Canada they have developed laws which included a similar system: the article 243 permitted to vote at home at the request of the voter, where an officer elections will be moved to assist them. You might have a look to see what are the constrains that they have and also what has been succesfull.
Hi Cansu, I head up with an investigation which might be of your interest, the government of the United Kingdom conducted a range of pilots of new voting systems, including a number of pilots of remote electronic voting (REV) systems. I read it from a paper but it's easily found on internet and has been adopted by many countries already.