Putting in a ramp, adding grab bars in bathroom, raising the sink height, etc.  

My understanding is profit from lending is considered "taxable income" and is therefore added to your income and subject to your normal tax rate after all deductions, etc.

Direct mail, SMS, door knocking, Facebook ads?"

After year 1 we added more originators, more processors, an appraisal review analyst, a VP of capital markets. 

Converting your current primary into a house hack by adding a studio helps you offset your current mortgage while learning how to be a landlord.

They exist but are far and few between.After bumping the rate to 7.5%, adding 5% to Maintenance, and increasing taxes to $2500, I would need to increase rent to $950 to cash flow.

You already live on the property and would be adding three more unrelated people, which is not allowed.Here's a link to the actual code:https://online.encodeplus.com/regs/orem-ut/doc-view.aspx?

Adding a 1/2 bath, new roof, central air or other typical improvements will increase the value of the property. 

What other concepts could be added to list of options? 

The first year after our divorce she still spent $100k on cloths and added another $60k on cosmetic surgery.