Someone in the legal profession told me that we can give her 30 day notice and then proceed with an eviction. 

Your sibling can use a 1031 exchange to defer capital gains taxes on the sale of the rental properties by reinvesting the proceeds into like-kind investment properties.

Quote from @Meliisa Lee: I recommend splitting the properties or selling them off and splitting the proceeds.

Those things won't matter if your business crushes it.

Ask your attorney before proceeding. 

It will probably require $100k plus to proceed.

And you must use all of your net proceeds in the purchases.The opportunity for you is that you can allocate the cash from your sale anyway you want. 

I mainly was curious about what legal grounds we have in order to proceed, since the PMA doesn’t specifically state “agent won’t grant criminals unsupervised access to your vacant property”, I figured that was just given!

And, again, eventually a strong business model/niche will show its numbers and then everyone will be doing it.

@John Davey Interest on a home equity loan used to purchase or improve rental properties is deductible on Schedule E as a business expense, but not on Schedule A for your primary residence.