If you feel that 100” is comfortable to view at that distance I say go for it. If you’re looking for a nice pull down, I’d take a look at the Elite Screen Manual B series: here
The 100” is sold by them on Amazon for $81 which is pretty awesome for that price tbh.
Elite Screens FBA is the manufacturer directly. So this Amazon link is shipped and sold directly by them.
They also a a 110” version in black located here