Rear derailleur 11 speed wide Ultegra $100
Front derailleur Ultegra $50
Ultegra R8000 shifters $350 (could also use 105 shifters to save a little, I wouldn't myself)
Chain $50
Cassette 11-32 Ultegra $90
Cabling $50
You should not need new brake calipers or crankset ubless the rings are worn, then maybe do the whole groupset. So, maybe $700 in parts and maybe 2 hours labor.
I'm 6'4'' and mostly use 172.5 cranks. I have used 200, 180, 177.5, 175 and 170 in the past. Somehow, I like 172.5.