Any advice or guidance you could provide would be greatly appreciated.

If they are legitimate, it will be trivial for them to sell the currency and provide you funds in USD. 

Once the renovation was complete, I helped the client with tenant acquisition and long-term rental management, turning the upgraded property into a sustainable income-generating asset.This project not only increased the property's value and rental income potential but also provided the client with a solid, long-term investment in the real estate market.

The seller provided the rent income history and all four tenants for 4 apartments are late and have been late in the past. 

Will it be very complicated to do a 1031 Exchange for my portion (provided that we relinquish the property and the sibling just receives the cash for her portion)?  

But the majority of the time, doing the active diligence can ultimately provide the best experience for any placed tenant which in turn will ultimately help yourself, if a property manager, maintain a healthy relationship with your portfolio of owners going forward for them. 

Management will likely be 15-25% of gross revenue depending on the service. 

But bottom line is you hired an individual for a service and they are not meeting your needs.

It decreased the most in Providence (-13 days), Raleigh (-12 days), and Philadelphia (-10 days).Time on the market increased compared with last year in 17 of the 50 largest metros, including Tampa (+6 days) and Denver (+5 days).

What if no other insurer will provide a new policy, but my lender requires full ongoing coverage, and would treat a naked situation as a default, meaning immediate loan repayment or foreclosure?