I have college students as well and found they are actually very comfortable with self-service showings as a group since they're already born of the Lyft/AirBnB generation already.

The only updates to the property I have done is replaced the furnace, fridge, and dishwasher.Would it be best for me to use my heloc to add bedrooms to the basement or go the full legal suite route to generate more rental income from this property? 

The income approach uses the income generated from the property to calculate value.You might have to widen your parameters to dial in some comps. 

Whether we’re looking at properties, cold-calling, deploying new marketing tactics to generate leads, underwriting deals, or having the ability to watch the morning shows without rushing through our normal routines, one thing is certain.

No closing costs.Non owner occupied will be 20% and higher interest rate. 20k repair generates 250k in value.

Perhaps out of state where you're more likely to generate good cash flow. 

Look up and understand the 4 wealth generators of RE.

I'm a financial advisor and the advice you've given is spot on, the people who generate the best returns are the one's who are buying in times like right now instead of panic selling. 

Our average cash-on-cash is ~20%/property and we're generating about $20K/month in net revenue after expenses and maintenance. 

That way the passive rental income is also generating some extra interest, even if it's only around 2%.