A neat feature with xfinity (no I don’t work there 😀) is the voice remote and once you have one box you can stream the service to the rest of your TVs cutting down the cost of extra cable drops. 

Most investors don’t even need an LLC and a holding company is extra, extra overkill though IMO.

House hacking lets you live in one unit and rent out the others, which can help cover your mortgage and generate some extra income.

Earning an extra 3% on $2k that you’re likely holding for less than a year.

I.e. a property sold down the street with 1 extra bathroom and 250sf more.

I'm considering converting the shed into a DADU to maximize the use of the space and earn some extra income. 

Home mortgage is $3700/month and $500/month extra payment towards the principal.

But there's something else that many people don't realize: these loans  "constant recast" during the interest-only period.For example, if I make an extra $400 payment one month, my interest-only payment will decrease the following month.

Any ideas on what I could turn it into to help generate some extra profit?

If you can tolerate it, go for the extra roommate.