In 15-30 years, this will all be noise, and properties values and rents will have increased.In the meantime, buckle up.

Up/down units can be terrible for noise.

If you're concerned about issues, make sure to have a camera pointed at the driveway, smartlock that logs all the comings and goings, noise monitor inside and you can even place one in the backyard, and lastly get damage rental insurance on each booking that the guest pays for by baking the charge into the nightly rate.

The nice thing is you have the housing authority to back you up when they don’t pay their portion or there are issues with noise or messiness.

I contacted the local PD, no police reports have been filed only phone calls placed from my property about concerns at other nearby address...dog barking, noise complaint, the latest was assist person.

Guest takes more care of the property, since you,  the host, are the only judge to decide if you retain or not the deposit in case of damage or issues.Another Good: You can write in your contract that non respect of rules may lead to lose some of the deposit: Like noise, or a very unclean check out, etc...

Avoid properties on main streets (traffic noise, avoid homes near freeways (smog/traffic noise), avoid homes without garages if most other homes have garages, avoid being in airport flight paths, avoid over building or over rehabbing for the area comps, know how to properly and accurately estimate ARv and rehab costs, and have money lined up in advance.

That made all the stress and anxiety worth it... the difficult tenants/roommates, constant noise, roommate drama, and lack of peace and privacy.This approach reflects the balance between comfort and profitability that Craig Curelop discusses in his book, The House Hacking Strategy.

They think grinding out every little savings is what will make them successful.

For example at one of my properties I added gutters and got some stumps grinded down.