Quote from @Erik Estrada: First off, great name!

Simple life, no assets, no marriage, no committments, job hops, more time off between jobs, maybe no car, 100% ETFs if they have any savings.

Value of HomeOperating CostsNOICost to turn a unitAny other pertinent information I need to considerAlso if any of this is way off please do tell.

But this can be off set because STRs can earn a lot more than LTRs.A host is very important to the experience of STR and responsiveness is critical.

If yes, are there considerations such as* can we sell off-market and for less than market value to SDIRA* Can I self-manage in SDIRA? 

Ideally, I was hoping to pay off this mortgage in about 10 years.

HI Blake,You can always start off by house hacking meaning you live in one UNIT or ROOM and renting out the other vacant units/rooms to offset your monthly mortgage payment.There are several ways to run and make sure you are maximizing your rental income while keeping your living expense as low as possible.

I would use my equity in my house for a short term purpose with a quite sure outcome of paying off the line. 

Current Assets:250k in 403B (max contribution)25k in 401k (wife 401k)400k in HYSA at 4.25% (need to move a lot of this, previously was saving for local Long-term Rentals... but haven't put enough effort into this."30k in checking50k in VTSAX15k in Disneyest 20k (bought side lot adjacent to property in 2020 1/2 acre for 15k... paid off)est 60k (bought back lot adjacent to property in 2020 3 acres for 45k... paid off)est 280k equity (Home valued est at 600k bought for 380, 320 remaining on note at 2.7% in 2020.

Sounds like you are off to a great start.#1 we have relatively few duplexes in the whole North Texas area it seems, compared to other parts of the country.