Zoning- certain towns are starting to restrict Airbnb type rental units.  

Focus on locations with strong population growth, growing or stable job markets, low operating costs, and no rent control restrictions.

@Ricky Hernandez  We bought in two different communities that had no rental restrictions then later imposed cap of 10% rentals. 

Now most of the time we don't see househackers/investors use in-house or portfolio loans from banks because sometimes they have more restrictive guidelines and higher fees for holding it which might cause the numbers not to work or for the deal not to go through entirely. 

If it's an HOA-based one, or has some other deed restriction, get out of the position.

Contractors can give you ballpark quotes on the spot, which will tighten up your budget.

Lending was another challenge, lending restrictions were starting to tighten up, and we had to get a bit creative with our lenders to get the financing we needed to close.

The City of Portland, and Multnomah County are more restrictive than most of the state for instance. 

Things like quiet hours, parking restrictions, etc.2.

If you’re using leverage, be extra cautious with your underwriting to ensure the deal still works at today’s rates.Economic Uncertainty: Inflation, potential recessions, or shifts in demand could affect rents, vacancy rates, and property values in some markets.Increased Operating Costs: Rising insurance premiums, property taxes, and maintenance costs can cut into profit margins, particularly for buy-and-hold investments.Regulatory Risks: Some areas are increasing restrictions on landlords, particularly short-term rentals.