Working 16+ hour days is not sustainable in the long term and is counter productive. Usually when people say they work "80-90 hours a week" I take it with a grain of salt.
Working 80-90 hours a week remotely with the freedom to work from an environment that you find relaxing is a lot different than working 80-90 hours a week in an office or dealing every day with the stresses of traffic and commuting. Yesterday I was laying in a hammock feeling the breeze come in off the lake and listening to the birds while working on my laptop. I couldn't work 80-90 hours a week if I didn't have the ability to look up from my laptop and instantly feel relaxed.
