The best advice is to consider each potential applicant on an individual basis, and consider the nature of the offense, the time that has elapsed, and frequency of violation(s).

But researching other Hosts pages, the number of reviews, frequency of reviews, and price can give provide a starting point.

Look up the "frequency illusion"! 

Other than changing filters, what other regular maintenance should be done with ac unit and at what frequency? 

You can keep sinking time and money into a dinosaur that will continue to crap out with increasing frequency, or bite the bullet and replace it.

There are many guys on the street corner who are not licensed or registered claiming they are private lenders, if they don't meet the definition, they are simply illegal lenders.Being in the business of something also takes into consideration the intent of the actor, the amount made, the frequency of transactions, their other sources of income or revenue, just as the IRS sees your business activities. 

- blog content frequency suggested 🗓- would you suggest implementing video as well?

It would be good to know the frequency of experiences like this with MI as well as other turnkeys.

Included in those considerations is frequency of transactions and intent. 1 is arguably few enough to not consider it ordinary but if it's 1 per year and the IRS sees you're doing it mainly to avoid taxes it could cause problems.

But you can adjust the stay-alive check frequency to minimize that.