I travel for work, so I'm not taking out a HELOC because I don't own a home.

They should become like current-day travel agents: far fewer than pre-Priceline, but well-compensated for arranging high-dollar, complex trips. 

As Kevin points out, traveling nurses make good money, and their employer pays for their housing.

Traveling Mailbox is a great value. 

Travel and per diem will be included. 

It's a former adult care home, so the layout is shared bathrooms, and this would allow me to not have to change the plumbing layout while offering a competitive price-point and unique experience to travelers.

I highly recommend you travel to the market yourself and spend a couple days driving around, looking at various properties, if you are going to be buying anywhere.  

I will also be tracking expenses related to repairs, maintenance, travel to and from NV, hotel stays, meals, gas, and other regular business costs.In the long term, I aim to purchase additional properties under the business name, but I understand I need to establish at least two years of income and credit history before doing so.The issue I’m encountering is that my accountant has not provided any guidance on how to structure this scenario.

For instance, there is currently a nursing shortage across the US, and traveling nurses help to alleviate it.

I myself have a 1/1 apartment on Davis Islands near the hospital that I'm considering renting to traveling nurses.The problem with rental arbitrage is that you need leverage as the renter to negotiate assignable lease terms with your landlord.