Installment Sale or All at Once Purchase?

[Kathy Moser]

Doing a seller-financing deal for multiple distressed houses. Total offer is $350,000 at this point. I want to do an installment sale contract because they all need septics, which have to be done within 6 months of the sale, estimated at $150,000 including surveying, engineering and permits. The town seemed open to possibly negotiating on the time line. The seller is open to that but would prefer to do it all at once.My lawyer suggested offering to buy them all at once, $50,000 down, $750 per month interest only for 3 years, then I'll refinance.It will cash flow a little bit at this rate, about $200 per month.My plan was to BRRRR them one at a time.Thoughts? Thanks