Hi,
There are as many opinions as there are people on that question.

It's not a bad question though.
My own opinion is that solid works best. Were you just looking at the options when you considered a hollow body or do you have some experience to base that on? Most self builders don't have the facility to build aluminum necks so for a one off it becomes expensive if you need to find one and buy it.
The other consideration is that if you buy any of the body/neck/tuning head parts you will be restricting your design options to what will fit around those items.
Would this be your first build?
Allan.....