That may help cover your current mortgage payment, the HELOC and still put cash in your pocket.Last ditch: if you happen to have somewhere else to live: If your "Investment home" is close or near to an airport (10-15 mins) consider: Renting Beds to Flight Attendants. 

Property: SFR in Ontario, CaliforniaRent $3200Mortgage Payment (2.875% rate) - $2661.06 + $185 HOA = $2846Mortgage Balance - $456k Estimated Value - $700k(3 bed/2 bath)

What can we do, I am currently in a contract with this property, it is originally a single-family home and the owner added (3) 1 bed 1bath units at the back (without securing permits).

Anything to highlight to local area.Take another look at your beds. 

No leads so far.This is summer where most of the students are either off on holidays or have an apartment.It is a 1 bed, 1 bath.

Storage occupancy rates during past recessions has remained relatively stableFor example, during a recession, when folks downsize from a 3 bed/1 bath to a 2 bed/1 bath, those people, historically, keep their belongings and put them in storage.Also, during inflationary times, self-storage operators can better manage rates because most leases are month-to-month.

If you have four 2-bed/1-bath units with the same appliances, split it four ways and call it a day.

It does not seem house hacking is possible in this market without renting out spare bed rooms (which is not an option).

This is DR Horton SFH, and is a newly built single story 4 bed, 2 bath that is surrounded by expensive MI homes. 3) Move into the townhome. 4) Use my $130,000 HELOC as an emergency if rent defaults do happen and save for a year until I reach my emergency fund goal of $41,000?

No leads so far.This is summer where most of the students are either off on holidays or have an apartment.It is a 1 bed, 1 bath.