One key factor is the size of the parties who stay in the area where you are considering your vacation rental.  

The only factor is the market values and interest rate hikes that are anyones guess to what may happen.

Mobile seems perfect for the small stuff, for bedroom, bath, kitchen, dining where you  can install  appliances, hvac, electrical, and plumbing in the factory - supplemented with  a kit based barn style garage and storage with large open plan living room above.   

Aloha,I would add that a critical factor is the type of investing you are involved with.

The critical decision factor is whether rents consistently increased faster than the inflation rate before COVID.Tenant pool - After location, the most important decision is the tenant pool.

It’s a really nice, newly updated 1bd/1ba condo in a ski community, so the inside truly is charming, but the building and the unit’s location within the building lack that “Wow” factor I see on so many listings.

Intel is a great example, who is building the largest chip manufacturing plant in the US right here, and it will be a $20 billion dollar investment that brings a few new thousand jobs.https://www.dispatch.com/story/business/2022/01/21/intel-ohio-building-computer-chip-factories-licking-county-jersey-township/9173472002/ Another example of economic growth is the upcoming Ohio State University Wexner Medical Center Inpatient Hospital which is a 1.9million square foot hospital that will bring over 800 new beds and a thousand new jobs. https://abc6onyourside.com/news/local/new-osu-hospital-expected-to-transform-health-careHere are a few more recent investments https://www.10tv.com/article/money/business/hydrogen-power-company-hyperion-bringing-700-jobs-to-columbus/530-25907aab-5517-4661-a9f3-d2ed2d5be6b0 https://news.wosu.org/news/2022-02-08/rumpke-to-build-50-million-recycling-facility-in-columbus Check out The Complete Guide to the Columbus, Ohio Real Estate Market which goes through the Columbus, Ohio market in depth and will give you a better scope of where the highest levels of growth are taking place and where to look to invest.  

One factor is a really well built house from 34 years ago is a better choice from a very cheaply built one from the same year. 

Plus another main factor is at least on the west coast the title companies have their own title plant a duplicate of the county courthouse and many are off shore so the title work is really done in the phillipines reviewed by the title officer and then given to the escrow officers to send to client. 

A huge swing factor is also quality of photos for those as well.