Search the BP for ADU appraisals to encounter numerous examples.

There are numerous numbers you can look at but it really depends on what your investing goals are for. 

In fact, numerous Tax Court cases have found in favor of the IRS when a taxpayer can’t document enough hours spent providing personal services to their rental real estate activities.Generally, material participation is determined separately for each rental property.

Sometimes it's ambiguous, but even then, why should I bother with the company that has numerous unresolved lawsuits, versus another company that is virtually the same but has none.

I did my first flip in 2002 and have done numerous since.

@Jonathan Moody Good information but I'd like to add some additional points (note that your mileage will vary due to numerous variables). 

In fact, none of the cards ended up being accepted since the banks can see you making numerous purchases.

So, I would be double checking with city even if it means numerous phone calls!

As with any other large renovation there were numerous challenges and lessons.

I ammessaging here because the Bookstore tech support has been a complete waste of time.After many emails back and forth, numerous times, numerous days and weeks, with supportgiving me the same canned responses, I eventually gave up and asked for them tocancel my account and refund my money and they just ignored me.