But if you grow your card balance to where you can not afford to pay it off and pay interest they can become bad debt and a strain on your income.    

This makes much more sense to me assuming it doesnt put a strain somewhere else. 

I also build investment duplexes, and that would put a strain on you, as there are alot of choices to make when building a house.  

No cutting in around the walls, and then if the windows have glass panes I just brush like there is no tomorrow and scrape it off with a razor blade once dry.

Thanks Cliff for these links , forgot to mention this is on a owned 4plex with $60k per year income so adding some improvements like Smart home energy monitoring and sustainable energy devices that will allow me to increase rents by 10% since we can show Tenants a 30% savings to them on utilities. last year did double pane windows that lowered tenants bills and reduced most outside noise. 

.- You have galvanized supply lines- Windows are single pane (easy to replace) inefficient for tenant.- Attic is poorly insulatedHere's are some comments on how I might tackle a your list or a similar rental:MUST DO BEFORE MARKETING to RENTERS:1) Repair all roof leaks $ 475.00 add clean out gutters11) Repair all cut-out holes in the interior drywall finished to paint and paint all repairs. $ 275.00 (give this job to the painter since there's not a lot)3) Prep all previously painted exterior surfaces and seal gaps between to materials.

The electrical panel is recalled federal pacific and is deemed dangerous.

So I initially assumed they missed something when hooking up the new panel. I

They have also asked to use their security deposit as last month's rent to ease some of the financial strain of moving.

If the wiring has not been updated, some newer appliances may give you fits such as the microwave oven(check to see if the electrical panel is newer [circuit breakers instead of screw-in fuses]).