Unfortunately it's a necessary evil to weed out the residents that are not ideal.

I think we have the option of taking out a heloc  and begin to invest elsewhere.The other idea , that I was thinking is paying off our primary residence which we owe 425k.

It is much easier to find HELOCS for your primary residence, but some lenders will do a HELOC on a investment property as well 

So they price those homes at what a willing homeowner will pay for their personal residence.

The parent must file a gift tax return annually, and any remaining balance is included in the estate.If the home was your primary residence for at least 2 of the last 5 years, you may exclude up to $250,000 ($500,000 if married filing jointly) of capital gains from taxes.

Investment Info:Single-family residence buy & hold investment.

I am a long time Little Rock investor and resident.

Investment Info:Single-family residence commercial investment investment in West Sacramento.

If you do have to move because of a job, you would be safest (in my opinion, i am not giving legal advice or financial advice), i would sell that property to ensure that you did not just purchase with the goal of moving out early and taking advantage of lower rates and lower down payments for purchasing your home as a primary residence. 

That is lower than market and puts you in a cashflow-neutral situation, but it is unlikely your residents can afford that.