Long story short, you are doing the right thing by asking these questions, listen to others in the local area and filter what they say and make sure you know what you are getting.In my journey I also looked at and had a deal under contract for a 5 unit in a not so nice area.

Typically I have a 'Maintenance Responsibility' section in all of my leases clarify that the tenant is responsible for cleaning, yardwork, air filters, etc however I've never had a rental unit with a water softener but I would include that also if i did.

I know that there is gonna be alot of properties that won't fit my criteria and will filter through it.

Filter by residential properties and select the multi type/s you want then include only free and clear.

Just make sure to filter numbers that are on the do-not-call registry.

New air filters may be the cheapest attempt, try a pleated one instead of a cheap rock catcher.

An almost endless array of filters can be used to laser target the best prospects with these lists.

Yes, it's human nature to feel like they took too little if they find out that you are making more than them.Heck, I still cringe sometimes, under my breath, when I see what some of my colleagues made on a deal they bought from me [I'm sure some of them do the same thing when this is reversed].For me, I'm glad the next guy is making money and that just means we will do another deal together.  

SECOND BEST LIST is No Equity and 100+ days on market PLUS add the filter of loan origination dates between 2018 and Jan 2022.

Luckily, the use of specific search criteria and filters can make it easier to find below-market value homes.