You'll also want to ensure you have a good property manager to look after the upkeep of the property if you are not there to notice anything deteriorating or which may need attention.This article goes into a lot of the considerations about whether to form an LLC or not: https://www.mmpph.com/wp-content/uploads/2019/04/May-2019-newsletter.pdfCreating an LLC in California would cost you a minimum tax of $800 every year.

If the roof has deteriorated, replacing a composition roof can easily cost $10,000.Rental comps - just because there is a tenant in the property paying a specific amount does not necessarily mean that is the market rent for the property.

I believe municipal authorities use 100 years as the guideline for replacement of cast iron pipes that are underground and those will deteriorate faster than those within your house.

This legislation will require: “the presence of deteriorated paint, which may contain lead, on the interior and exterior of pre-1978 residential structures and on bare soil be identified and correctly addressed.”

It has not been well maintained over the last 10 years and is beginning to deteriorate. 

Spring deterioration is normal wear and tear and hell no a tenant is not responsible for maintaining the springs on a garage door.I tell the LL to pound sand..... prove there is was negligence or a commonly accepted documentation that garage door spring maintenance falls under tenant responsibility for general unit maintenance. 

Quote from @Maria Holodnaya: Maybe they are trying to clean up a neighborhood that's been allowed to deteriorate for too long?

You'll also want to ensure you have a good property manager to look after the upkeep of the property if you are not there to notice anything deteriorating or which may need attention.Creating an LLC in California would cost you a minimum tax of $800 every year.

Gentrification in older urban areas with rundown housing stock might be the only thing that prevents all of that rundown housing from becoming unoccupied, and eventually being razed due to their unsafe conditions as they continue to deteriorate while unoccupied.

The landscape is crowded with these nightmare properties that sellers allow to deteriorate.