Would you ask for a non-refundable pet deposit and increase rent or just one or the other?  

Give her notice to non renew her lease.

I'd recommend talking to the smallest 5 or so banks or credit unions in your area, particularly with a portfolio/commercial lender. 

I’ve heard that I need to register my LLC in that particular that I would be looking to buy in, in order to be able to legally get the property under my LLC. 

PA tax sales are particularly treacherous I believe. 

If you want lower your standards that’s your choice but be prepared for issues either with damage or non payment of rent and going through the process of eviction all while you’re collecting nothing and having to pay the expenses along with legal fees.

It would depend on your lease but in your situation my insurance coverage would not allow those particular dogs.This is a tennat you will ultimately end up having to get rid of.

Personally, I also have nearly zero control of my stock market investments.Real estate on the other hand, APPEARS to be open to the non super wealthy among us, willing to put in the time and effort to learn the nuances.

Remember he pays all costs/legal fees for drawing up th emortggae.You need a significant non refundable DP to cover your costs if/when he defaults.

My interest has been piqued in real estate investing, and particularly rental property investing.