I am no one to give advice. thoughts sure....
Fasting could be a means, I have occasionally employed that as well, it is not unknown nor not utilized in Tibetan and other forms of Buddhism.
It, the state produced, may make this easier for a bit to my experienced.
But to long engaged and it becomes another thing. And it is not a excuse to not doing the regular practice withoui fasting. As a adjunt to it... to assist and provide a variance to it ....I endorse that.
It after the intiial provides a source of particular energy which is not conducive to tupor so it may be conducive at times to being awake.
That is my experience.
Overall this sounds well thought out, and a good plan.
I don't know what your plans are for insight but I approximate they are also as well thought.
To add...to my experience these things are done much easier in retreat houses if one has one near one, and has a bit for the fees.
Other religions also have retreat houses monestaries or such things and will allow buddhists to also be there doing their thing.
Just a idea one may perhaps consider that,it does not have to be a place of buddhist retreat. Any retreat place wil do actually...no phones disturbances it can make this thing very very easy. And many give food of ones choice one does not have to cook