Happy to help you with either option, send me a DM.

There are risky, but high return options like QQQ which grew 27% over the last year or on the other side / safe end, there are super secure short term US government bonds like SGOV which pays out about 4.5% in dividends. 

The best option is to respond quickly and professionally in hopes that they move out.I would give the tenant two options: 1. vacate the rental in one week, leaving it in the same condition as when they moved in, and I will refund their deposit within 72 hours; or2.

Try to get an extended closing and/or options to extend the closing until you are ready to close on the sale of your relinquished property. 

They should have the option to install a security alarm at their own expense.

If you’re looking for a straightforward, hassle-free option, I highly recommend checking them out!

Our strategy is looking for multi-family homes to purchase and hold as option 1. 

.: Quote from @Donald Hatter: Option 2 is the last option I would suggest.

They have lots of options for you, depending on your budget.

There are DSCR lending options in your personal name.