Sorry to hear about your troubles, compounded by the Holiday's makes it even worse!
I think your best bet is to work with your mortgage company for your personal home to defer payment for a few months (or see if they will let you make interest only payments). I would suggest talking to your local branch if possible so they can put a face to your name. Make sure to calmly lay out all the problems you've had with the investment property and your wife losing her job. Clearly explain your plan and time frame for getting back on your feet - the property repairs, rent increases, evicting the bad tenant, wife applying for new jobs, etc.
What is your equity position on your current home? You could try to get a HELOC to pay the mortgages. I know you mentioned that the rental is under and LLC, why would that prevent you from getting an HELOC? You may also be able to get a business/commercial loan using the equity in your rental as collateral if you can't get a HELOC on it. Sounds like you have good equity on it.
Also keep in mind that taking more debt may not be a good idea at this point - it will cost you more in the long run. The ultimate option would be an interest free loan from a relative if that is feasible.
Make sure you are documenting all interactions with your tenants in writing. Take notes during your meetings with her and mail a copy to her afterward. Make sure any warnings given are done by certified mail. I would immediately send her a certified letter stating the situation with the electrical so it is clearly defined if you take her to court or have to evict.
Remember - this is business, you can't be the "nice guy" 100% of the time.
We're pulling for you here at BiggerPockets. Just try to stay calm and remember it will all work itself out one way or another.
