Quote from @Nestor Morales: Harris seems to be the best option now to save the US from ruin that means voting for Project 2025.

The city is about to build a new park right next door and I fear that these properties will somehow ruin that too. 

Thats what a savvy successful realtor will do  a hungry starving one may push the point and want to get paid.. you know and then ruin the whole relationship. 

They ruined one of my Jacksonville properties.

They ruined one of my Jacksonville properties.

They ruined one of my Jacksonville properties.

Hello Misael, I would do a thorough market research to verify that you can get the rent increase you want, you might find out that the market is oversaturated with rentals.If you are trying to raise the rent $100/mo, 1 month of vacancy ruins your rent increase for the whole year.I would list the property for lease 45 days before your tenant's lease expires, if you have your property priced right you should get some applicants before your lady moves out.

Any tips to keep my good relationship with the owner and not ruin it in the future because of this business?

If you can't find a PM, don't invest in that market, because a bad PM can ruin a good investment.

They ruined one of my Jacksonville properties.