Rev Proc 2021-31 For passenger automobiles to which bonus first-year depreciation deduction applies and that are acquired after Sept. 27, 2017, and placed in service during calendar year 2021, the depreciation limit under Sec. 280F(d)(7) is $18,200 for the first tax year (an increase of $100 from 2020); $16,400 for the second tax year (an increase of $300); $9,800 for the third tax year (an increase of $100); and $5,860 for each succeeding year (an increase of $100).For passenger automobiles to which no bonus first-year depreciation applies, the depreciation limit under Sec. 280F(d)(7) is $10,200 for the first tax year; $16,400 for the second tax year; $9,800 for the third tax year; and $5,860 for each succeeding year.

The level of federal debt and the dominance of the housing market and all ancillary (furniture, automobiles, etc) parts as a huge part of the economy meant that the fed has had to keep interest rates low for so long that eventually the creation of so much money through real estate lending was going to start weighing heavy on hard assets.

(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

Real estate, automobiles, every industry is the exact same.

Are you going to get a new drivers license and update your automobile registration? 

Most states I think consider mobile homes in the same classification as an automobile.

Assets that may be used to secure funds include automobiles, artwork, collectibles, real estate, or financial assets, such as savings accounts, certificates of deposit, stocks, bonds, and 401(k) accounts."

Also mobiles started to be built on an assembly line like an automobile , more quality more control of the process.Also its way EASIER to get financing when you sell a mobile built 1977 and newer.Hope that helps.DD

IOW, this covers you, the owner, to bring the property to complete if faulty workmanship, defective materials, carelessness, or accident occurs.And another (while I am at it): Automobile Liability What if a vehicle backs into your building?

No different than the envirotest debacle of taxpayers paying millions of dollars a year who own automatically compliant automobiles that basically can't violate clean air rules to pay for the ability to police a tiny percentage of vehicles that could, might or do violate the clean air rules.