Possibly backing out of a purchase. Need an experienced perspective please!

[Mike Robbins]

I recently started going through the process of buying a SFH for just myself made an offer and it got accepted, gave the sellers Realtor a 1,000 deposit. Process has been held up for about a week now for some paperwork from the town for the septic tank. But I've always liked the idea of owning a duplex and having a renter pay off my mortgage while I live in the other side. I've already done some research on duplexes in my area and found some suitable ones in my area, and am thinking about backing out and going for a duplex. What would you do if you were in my shoes?