In article ,
wrote:
I realize that this is an impossible question, but I'm just looking for
some guidance.

How long should it take to build a Quick Built RV-10?

Everything new (engine, prop etc...)

IFR cross country aviionics.

Working on it 16 to 20 hours a week.

Whatever you hear from anybody else, remember to take "Cheops' Law" into
account --

"Nothing *ever* gets done on time, or within the budget."