How to get the seller to consider a low offer

[Allen Clark]

In another thread @Steve Vaughan mentioned a few strategies on how to get an owner to consider a low offer. I have a house in Seattle, Washington that I would like to buy but when I ran the numbers they just do not work. They want $750k and I could only get the deal to work at $625k so I walked. I told them I'm an investor and asked if I should write an offer at $625k and they said no. I figure it'll sit for quite some time until they get more realistic with their pricing. My question is how can I help them get there quicker and be there if they get to $625k?

Steve had suggested the following for another user (at a different price point):

1) Cash out through a loan. Say $326,457, closing in 60 days.

2) Seller-carry with $x down at market rates, $X per month headache-free cashflow $342,187 closing in 21 days.

3) Master lease with option to buy, 30 or 60 month term, $x per month, taking care of management and first $300 of repair expenses: $351,324, closing in 14 days.

I do not understand the mechanics of how #2 or #3 would work. Can someone give me a little more detail?