Does anyone have experience with Minority Buy-Ins?

Hey guys, Had this idea and wanted to sanity check it with you. Totally just an idea, so curious what you think and whether you’ve seen anything like this work. Using very standard numbers: a $1M EBITDA business at a 15% EBITDA margin, so roughly $6.7M in revenue. Valued at ~2.5x, or $2.5M total. I buy 30% for $750k, and that entire amount is seller-financed. No upfront equity check (Investors could also come in maybe). The seller note is paid monthly principal and interest over 5 years at ~10%. I’d come in purely as an advisor or fractional COO type, maybe ~5 hours a week, focused on ops cleanup, growth levers, and AI enablement. No day-to-day running of the business. After normal capex of ~2% of revenue and the seller note payments, free cash flow is about ~$675k per year. My 30% share is roughly ~$200k per year in cash. At a flat exit in year 5 at the same multiple, my 30% is still worth ~$750k. So meaningful annual cash flow plus equity upside, with very limited involvement and risk on my side. For the owner, they sell a minority piece of a strong business, keep control and 70% ownership, earn a predictable ~10% annual yield on the seller note, and get free operator-level help instead of paying consultants. The business also gets more professionalized and better positioned for a later full exit. On paper it feels aligned, but I don’t know how it plays out in reality. Have you seen something like this before, and do you think sellers would actually be open to it? Would love your honest take