That "switch" in the electric service panel is a breaker.

You want to protect your old tenants, by creating a strain between them and the new landlord?

The house has new double-pane windows, few roof, new furnish, new electrical box with a 175 AMP, and it even came with an EV charger in the garage.

Things as simple as a front door, double pane glass, paint colors, type of paint etc all come into play.

Be sure to talk to them about 3% down conventional loans, because FHA loans are notoriously difficult, and sellers will prefer a conventional over an FHA, because the FHA appraisal requires the seller to fix little things like peeling paint, broken window panes, loose handrails, etc. while conventionals typically do not.Some borrowers are approved for a higher loan amount through FHA than conventional, but I believe the MIP is generally higher.Also, this is something your agent should be helping you with.

There's 3 different roof types, warped "wood" wall paneling, old single pane windows, etc.  

She is financially irresponsible, living beyond her means, rent would never be paid on time and having her as a tenant would place a serious emotional strain on your existing tenants.

I would put in his head that he should think about relocating in the near future (make up any excuse you want) as it’s not going to be any easier to raise the rent next year and it’s just not worth straining a families relationship for 40 bucks a month.

I doubt insurance would pay for improperly installed solar panes and/or damage done to your roof from leaky brackets. 

Do you have double-paned argon-filled windows in your home?