Is it worth a reduction of an already very small probability of an IRS audit?

Well I just brought them a portfolio for $3.4 million worth $6.5 million and now they don’t do this kind of a deal.

Otherwise you could end up owing more than what the house is worth, which a lot of investors are struggling with now. 

Wondering if it worth it to explore providing temporary leasing vs. long-term leasing to begin.

A HELOC or cash-out refinance is definitely worth exploring if you want to free up capital for more investments, but make sure it fits your goals and comfort level.

Additionally, ensure that all necessary notices for filing an eviction have been posted and properly documented in your records.

Well worth it IMHO given poor performance of RTO/seller financed zillow listings. 

Most land bank properties, Detroit or Wayne County, are trainwrecks and cost more to rehab than they are worth - unless the market keeps improving.Be careful on the next one, but keep improving Detroit!

Would it be worth exploring the possibility of partnering with an investor somehow to help with funding?

This will be costly in today's market and interest rates, but might be worth a shot if they can afford to stay.If they don't want to stay and you want the the townhome to rent to someone else and just want to assume the loan, well then she can call the lender and see if the loan is assumable.