In theory you could try to see if the seller will do a lease option. It sounds like this particular seller isn't motivated enough to sell though. You can try talking to him again about doing a lease option. Just explain that you understand his position on the matter about pricing.
Ask him if he's willing to enter into a lease option agreement whereby he will get his asking price for the home and then tell him that you will work with him to find a tenant that he can then screen to see if they would be a good fit. Once you do that you can either do a sandwich lease option or just a wholsale lease option.
A sandwich lease option is where you have 2 contracts one with the seller and one with the buyer. This puts you in the middle thus the term "sandwich lease". With a wholesale lease option you only have one contract with the buyer once you've found one that the seller approves of and then you simply assign your part of the option to the seller so you're out of the deal. I'm not entirely sure if a wholsale lease option is entirely legal so if I were you I'd see about doing a sandwich lease option. Hope this helps you out.