Let's break it down: Assess Your Financial Situation, Market Research, Evaluate Your Budget, Risk Management, Consult Professionals. 

I am evaluating 6-10 unit apartment buildings and wondered how others have structured seller finance deals?   

It is crucial for investors to carefully evaluate their options and make informed decisions when dealing with insurance claims and property restoration.

My questions are around how to evaluate if its a safe/stable investment alternative? 

However, it's crucial to thoroughly evaluate all costs involved, including land expenses, construction costs, and potential challenges with financing.

You can reach out to your local (state) Self Storage Association, peruse topics on You Tube, and certainly many, many forums here on Biggerpockets with quality folks & quality content.Regardless, of how you piece your learning together, everything (soup to nuts) for an Acquisition is either FINDING a lead, EVALUATING to determine if it's a deal, now you're in the PURCHASING phase, and after you close, now it's all about MANAGING.If you think that at times it makes more sense to build than to buy, then you'll want to learn about Development & Conversions.  

Use this equation to evaluate how much to offer on a property:Max offer = After Repair Value x 70% - Rehab BudgetDo you homework on comps to get a good idea on the ARV. 

To evaluate your situation you need to get a handle on the expense side of the equation

Explore options like conventional financing, FHA loans, or private lending, and work with a mortgage broker or lender specializing in investment properties.Overall, it's essential to conduct thorough due diligence, seek advice from experienced investors and professionals, and carefully evaluate your options before making any decisions.

You need to evaluate how the additional interest expense will impact your cashflow.