However, if I don’t secure an eviction order within the next two months, I’ll send him your message.

Possible (but I doubt easy) if seller takes a 2nd / subordinate position to the bank or is secured by other property you own.

Now, over a year and a half later, he sent a certified letter last week demanding the security deposit or legal action within 30 days.Please advise. 

I just had tenants move out of my investment property (duplex) without paying for the last month's rent, and the damage they inflicted onto the property exceeds their security deposit amount.

There really isn't a safe, secure way for someone to protect their interests.

Other notes: - Higher density multi family properties can be very hard to secure on the coast, but very profitable.

Give her 30 days notice now, keep her security deposit, and send her a additional bill for damages to the unit in lieu of taking her to court for the damages.  

Exterior security cameras.

It takes a lot of energy to thoroughly vet a deal and a borrower to make sure financing is secure.

It’s a smart way to dip your toes into investing while securing your first home.You’re not being too ambitious at all!