I always dig into the borrower though (character) - honesty, experience, skill-level, etc.

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.  

Why 4 units in 4 years?

So I've been thinking of joining the Air Force for 4 years, during those 4 years I would buy 3-4 unit properties which later after the 4 years I can get into Commericial real estate by doing a 1031 exchange or getting loans from private investors so that I can buy bigger multi-family properties.

If they did not provide a forwarding address we send it to the unit address, hoping they filed a change of address form.

With a house hack you buy a single family and rent out rooms to roommates to make money OR a small mult-family (2-4 units) and rent out the other apartment(s).

Rent in the neighborhood is $895 for a 2 bedroom, 1 and 1/2 bathroom, so for 4 units it will total up to $3,580 ($1,073 difference).

I'm with a third-party Property Management all over Houston managing a little over 300 Single-family or Small Multi-unit rentals!!

They sell a 4 unit for close to 1 million dollars close to Jacksonville. they want 250k or 300k down. there's no upside. you can google the properties on biggerpockets and there isn't a lot of satisfaction. it's a slow return and get rich slow strategy. our focus is always as a builder to add maximum value, lower cost as low as possible, build and rent and build and sell the same product and raise prices to help investors out. we have a large market share and large purchasing power in our market in columbus ohio. the one strategy I never liked about turnkey new build brokerage companies like them and build2rent or others is they don't really build close to urban centers and most are single family homes. the numbers don't work on single family homes. if single family was the way to go more companies would be doing it. but by far the most common type of new construction built is three story walk up apartments.

Deviations from the Private Letter Rulings will significantly increase your risk of structuring this type of advanced 1031 exchange.You should discuss this more advanced 1031 Exchange structure in greater detail with your legal, tax and financial advisors to determine your comfort level with this complicated 1031 Exchange structure and the inherent risks involved.