Options may include traditional mortgages, private lenders, partnerships, or even self-directed IRAs.Calculate all potential costs including property acquisition, renovations, property management fees, taxes, and maintenance.Property Selection and Due Diligence:Use your local team to scout properties that match your investment criteria.Conduct thorough due diligence including property inspections, financial analysis, and reviewing rent comparables (rental rates in the area).Make Offers and Negotiate:Submit offers based on your research and due diligence.Negotiate terms that are favorable to your investment goals, taking into account potential repairs or improvements needed.Close the Deal:Once your offer is accepted, work with your local team to complete all necessary paperwork and close the transaction.Ensure all legal aspects are handled properly, including title searches and property inspections.Manage Property Remotely:Hire a reputable property management company to handle day-to-day operations such as tenant screenings, rent collection, maintenance, and emergency repairs.Establish clear communication channels and expectations with your property manager.Monitor and Adjust:Regularly review your investment performance and financial metrics (cash flow, occupancy rates, expenses).Stay informed about market trends and adjust your strategy as needed to optimize returns or mitigate risks.Long-Term Strategy and Growth:Evaluate opportunities for portfolio expansion or diversification in the same or different markets.Continuously educate yourself on real estate investing best practices and market dynamics to make informed decisions.By following these steps diligently and leveraging local expertise, you can effectively navigate the complexities of out-of-state real estate investing and build a successful portfolio over time. 

Calculate operating expenses, including property management fees, maintenance, taxes, insurance, and utilities.

This will allow you to get to know the property, its maintenance items, and slowly tenant proof(upgrade) the units before you move back to CA.

Create a budget for yourself allocating costs such as utilities and maintenance so you are prepared when unforeseen costs appear. 

This includes insurance, local taxes, utilities, maintenance etc.

But over the long haul, these things are relatively rare.Further, if these are properties you just rehabbed and rented for the first time, those tend to have more maintenance issues up front.

Pay for maintenance.

You will have more maintenance cost and down time when that happens.  

It will probably only get used during the winter. and I can see some maintenance issues too with all that moisture inside it would be easy to get mildew or mold growth started if it is not maintained properly and often. also it is traditional to follow up your time in the sauna with a dive into a nice cold lake (or pool), or at least you might want to have a cold outdoor shower nearby. personally I would spend my money on something like a hot tub before I bought a sauna.

You have a maintenance issue…unpredictable cash flow.