Clean and disinfectBelow is a link to the CDC (Centers for Disease Control and Prevention) which describes the outlined topics in more detail.https://www.cdc.gov/coronavirus/2019-ncov/prepare/prevention.html We hope you are safe and enjoying time with your family.

Our goal is to save as much of our own money (reduce personal rent) while being owner occupied, this makes triplexes and quads appeal more to us.

While evictions are currently halted nothing prevents a landlord from filing an eviction action with the court. 

Is there anything preventing me, from a lease/legal perspective from doing this?

You need to have written policy in how you deal with tenants and apply that policy across the board.If you allow pets under a certain weight, they have to be allowed across the board.If you have a policy that all tenants must make 3 times the rent, then all tenants must meet that.And if you have a policy about waiving late fees, or reducing rent, or waiving one month of rent, whatever it is, you really need to apply to all.When landlords get into case by case basis with a different rule or decision for every tenant, that's when you set yourself up for a fair housing violation.   

That helped reduce my DTI.

This will greatly reduce the need for office space.

The economy goes through a recession can you handle vacancy or reduced rent for a time being.  

All of this to reduce exposure and will sanitize all for knobs I touch after they leave. 

Looking likely that many lenders are going to offer Mortgage Forbearance such as reducing payments for a few months or suspending payments for a few months.