Don't waste your time, buy a quality bit. I've drilled tons of holes in SS kettles and kegs, go out and buy a cobalt (cobalt being the material not the brand) bit or the whole set.
Measure from the floor to your armpit and subtract one inch.
This is the height that you want the rim of the kettle to be so that you can easily reach down into it.
you could always just weld threaded rod couplers in there for the cheapest solution
http://www.grainger.com/category/rod-coupling-nuts/nuts/fasteners/ecatalog/N-8lo
Depends on the yeast strain you went with, but for WLP380 and 3068 I ferment at 61-62.
Fermenting at the higher temps are more likely to give you off flavors, even though they may be more robust. I used to do this on my first hefe batches.
Ive brewed over 40 Hefeweizen batches and Ive settled...
The OG of this beer is insanely high for anything that would even remotely be regarded as a hefeweizen. You are definitely into the weizenbock, weizenstark beer territory.
The info previously mentioned about hops is something that should definitely be taken into account, this beer would be...
I don't think using 100% munich malt as your pilsner malt will accomplish this, or will give you the results you're expecting. Munich malt in a Hefeweizen should generally be used as a minor addition to a German Pilsner malt for the barley portion of the Hefe.
To achieve what you want, you...
Going to the 25 gallon is definitely a good idea if you want to brew a full 15.5 gallons to fill a keg. It will give you more space and help with boilovers.
I think if you want the sight glass and don't want to drill into a kettle, I think you answered the question for yourself. It's more a...