You can look at successful STR's in your area and make a list based on photos.  

Based on my calculations, even with a low down payment, I can achieve positive cash flow (with aggressive enough house hacking).

I would deny based on whether they had an outstanding debt/judgement to the prior landlord.

Based on your response I can give you some paths.  

Because the property is so unique pricing likely needs to be as well, maybe consider that based on the property needs/maintenance and location you may not want it consistently turned over so maybe you open 28 day slots and allow use with a 1 time per month turn over.

argues that zoning ordinances should prioritize functional families and not exclude safe uses of housing based on household composition.

The overall trend of the 10-year treasury appears to be downward reflecting as well right now, with the most recent high of 4.8% on 1/13/2025 failing to touch the previous high of 4.98% on 10/19/2023 and now sharply falling to 4.62% today (1/24/2025).

If the numbers don't work for expanding the building, explore the potential based on the current space. 

Are there any other areas I should consider based on my budget and purpose?

In the end, buyers would overpay for the actual property based on earnings.