If you're looking for appraisal value an ADU may not be the best bet, but if you intend to sell, my anecdotal evidence suggests in dense highly desirable neighborhoods, ADU square footage will gross the same as the main house.

My bet is they won't be happy about it.  

Rooming houses usually don't get to take advantage of sporting events, concerts, festivals that usually result in spikes in rental fees and more profits ( and glory) that AirBnb and other STRs get to.

My four adult children are out of the house; so, below are goals for our 11 year old and me.Read 15 minutes per day and log it.Set limit on daily electronic use.Clean up after himself (toys, push chair in, dishes, clean bedroom, clean car).He plays sports and has a few tough baseball goals that he works with me on (inside/out swing, pitching mechanics, 3B fielding). 

Your philosophy is let's compare this strategy to paying your mortgage off in another way or putting your extra money in stocks or saving up to buy rentals or buying a sports car or going to Disneyland or starting a secret family with your secretary, it'll be fun.

There is a lot of misconceptions still, about what it is, how it is mined and how it could penetrate daily lives even more than the internet did and does. 100k is the low end...Mcafee ( the security software guy) is a coin miner and says that he bets bitcoin hits 1 million by 2020 or he will eat his own private parts.

Stop hanging out with your deadbeat buddies who spend all day drinking, talking sports, and otherwise wasting away.

I think you need to sign up on Meet Up and RSVP: Tuesday, Nov. 12 Walnut Creek  at Rotator Taproom 6pm (short notice - it's tomorrow)Thursday, Nov. 21 Oakland at Two Pitchers Brewing Company (hosted by Tyler Jahnke of Kenji Capital)Saturday, Nov. 23 Tilden Nature Area, Berkeley hike at 10am (hosted by Tyler Jahnke of Kenji Capital)Thursday Nov. 14 San Francisco - Happy Hour/Networking at Alchemist Bar and LoungeTuesday, Nov 19   San Francisco - 100% Funding for your Deal (Sports Basement at Stonestown Galleria mall)https://www.meetup.com/bayarearei/events/304151177

I'd bet that nobody with a single working brain cell will sign a lease with your brand new LLC without you personally guaranteeing it as well.As for the writing style, this is totally subjective and unique to each person, but I think you can be professional without being overly formal.

I could be wrong, but the only way to make lots of money is to make educated bets and execute them.