It gives a lot of resistance when closing and seems as though it may need to be replaced/fixed.

@Pat Aboukhaled wife & I have thought this would be a great use of failing malls for affordable housing.Unfortunately, as @Greg Scott points out, many people take the path of least resistance, which can ruin the idea.So, you'd want security cameras and maybe even security guards to hold residents accountable. 

@Landon Lehmann many investors borrow against their primary residence equity to invest.Getting a HELOC can also be the path of least resistance and cheapest.There is risk though, that if you investment results in a loss or lawsuit that you could lose some or all of that money and more (lawsuit).Getting more insurance is typically easier than setting up an LLC and meeting all the requirements to separate your business from your personal assets.What are you doing to source potential flip properties?

This challenge may cause you to take the path of least resistance and pursue a 2-4 unit with a residential mortgage.

Modern lumber is also a lot more prone to termite damage as it is softer and easier to consume whereas old lumber is extremely resinous and naturally termite resistant.

If they’re still resistant, you might want to consider negotiating a compromise, like a smaller increase or a gradual rise over time to ease the adjustment.

She likely can turn to legal assistance for tenants rights, especially if she’s taking care of a handicapped son, so be prepared for resistance.

I think I will be buying a bunch of detectors, but I don't yet know what "tamper resistant" means for a sealed detector.

I understand investing in yourself, but with so much info flying around for free I wouldn't want to do it.I didn't help your question at all, but when I saw the price tag I couldn't resist.

So having some financial modeling background I could not resist any longer.