Not really a thing; if it is so for religious reasons it will be super niche and you'll probably still be charged interest they'll just call it something else like an "account maintenance fee". 

2.4.8 - Single-family Residential 6 (R-6).In a R-6 single-family district no land shall be used and no building shall be erected for or converted to any use other than:a)Principal uses: The following uses shall be permitted as principal uses:1) Single-family detached dwellings.2) Public and non-profit institutions of an educational, religious or cultural type excluding corrective institutions and hospitals.3) Governmental buildings and uses.4) Public utility uses required to service the district.5) Public and private noncommercial recreational areas and facilities such as public parks, country clubs and golf courses, excluding miniature golf courses and driving ranges.6) Temporary buildings when they are to be used only for construction purposes or as a field office within a subdivision approved by the city for the sale of the real estate of that subdivision only.

I am a long way away from leaving my 9-5, but as so many investors say we took action and started that journey. 1 more thing I would STRONGLY recommend maybe even more so than the others, find a local meetup, I attend mine religiously and I have learned so much from other investors.Good luck!

(i)In generalThe term “period of nonqualified use” means any period (other than the portion of any period preceding January 1, 2009) during which the property is not used as the principal residence of the taxpayer or the taxpayer’s spouse or former spouse.se of the property, relevant factors in determining a taxpayer's principal residence, include, but are not limited to—(i) The taxpayer's place of employment;(ii) The principal place of abode of the taxpayer's family members;(iii) The address listed on the taxpayer's federal and state tax returns, driver's license, automobile registration, and voter registration card;(iv) The taxpayer's mailing address for bills and correspondence;(v) The location of the taxpayer's banks; and(vi) The location of religious organizations and recreational clubs with which the taxpayer is affiliated.https://www.law.cornell.edu/cfr/text/26/1.121-1https://www.law.cornell.edu/uscode/text/26/121

It's by far the best REI meetup in the area and I attended religiously when I lived in Metro Detroit.

Anyone trying to throw doubt on the reality of this Promised Land found himself being attacked as if he had blasphemed about a religious faith or love of country.As the crowd piling into the market grew, brokerage house offices grew more than doubled - from 700 in 1925 to over 1,600 in 1929 - mushrooming across the country into such places as Steubenville, Ohio; Independence, Kansas; Amarillo, Texas; Gastonia, North Carolina; Storm Lake, Iowa; Chickasha, Oklahoma, and Shabbona, Illinois.

BTW, your statement about ethics, I have a feeling you're off a bit on that angle.Business ethics, as I just recently posted, is not your opinion or anyone's opinion of what is acceptable in any industry, it's not a religious point of view, it's not what we personally feel might be right or wrong, business ethics are established expectations of conduct for those dealing in that industry.

Exceptions are classes for employees by a employer, a closed membership group not available to the public or religious training by a church. 

Or, they are Jewish and light candles at religious holidays, OK hovering landlord, try that!

One notable attraction in the area is the Hsi Lai Temple, a large Buddhist monastery that serves as a cultural and religious center.