During COVID I made a lot of money putting used furniture in half way updated houses 30 mins from downtown. 

It is a 4 bed, 2.5 bath 3,000 sq ft on a half acre lot with a large fenced backyard and unfinished basement.

If it's only half the duplex, then you're looking at $35k in depreciation (Half of $285k x 25%).

Imagine if it cost 1000 to send out 50 letters but half of them responded and half of those wanted an offer and half of those accepted an offer and half of those closed and half of those resold for a net 50k. 

I either want to convert half of the property into airbnb (8 rooms downstairs for airbnb), and the other half (8 rooms upstairs) for longer term tenants, or either the whole property as airbnb.

Beyond that, certainly any money that's made they're going to be entitled to half of it, regardless of what you spend. 

With over half a decade of working for mid-sized accounting organizations specializing in financial reporting, budget/forecasting, and compliance.

My listings have only been active for about a week and a half.

I’m considering selling it and selling my primary residence to build a duplex where I’ll live in half and rent half. 

Hospitals don’t vet spouses, and every horror story I’ve seen with travel nurse rentals has come from the non-nurse half of the household.Income can come from either, but verify it.Some landlords rely entirely on the nurse’s contract letter — and that’s fine if they’re the sole payer.But if the spouse is contributing or working remotely, verify their income the same way you normally would.Bottom line:Screen both adults.Base income approval on whoever is actually paying the rent.Use the nurse’s assignment letter as proof of stability, not as a free pass for the spouse.It keeps things fair, consistent, and avoids the “I wish I would’ve screened the partner” headache that way too many landlords talk about.