Buying three lots (#3 & #4 & #5) but co-owning only Lot 4

[Linda Gonzalez]

We are getting ready to buy three lots from our neighbor. Lots #3 & 5 are vacant lots with Lot4 sandwiched in between. Lot 4 has a cabin on it. Here's the sticky part-- my husband and I want only lots 3 & 5 (the vacant lots, each of which adjoin other properties we own). A family member wants to go in on the purchase of Lot4/cabin with us. We were originally was planning to present two separate Purchase Offers-- one for Lots 3&5, (being purchase by self & hubby) and a second Offer for Lot4/cabin (being purchase by self, hubby & sister). That way we would have separate HUD statements/closings and most importantly, the deeds would reflect hubby and I only on Lots3&5, and then hubby, me & sister on Lot4/cabin. BUT.... Seller now tells me she wants just one Offer for the whole thing and consequently only one closing/HUD statement for the whole thing. Her fear is that it will be easy for us to back out of one or the other Offers and thereby leaving her with only one or the other to sell. I assured her that wouldn't happen, and that we're willing to put it in writing for her. I suggested writing into the Offers that each offer is contingent upon the other, or something to that effect. We'ire hoping she agrees with this...

BUT... if we do indeed end up buying all three lots in one deal-- could we then have sister file a Quit Claim deed on Lots 3&5 (the vacant land)?  So that it ends up with her name only on the deed for Lot4/cabin?   OR... would it make more sense for hubby & I to buy all three as one whole package, and then add sister's name to the deed on Lot4/cabin?  Sister's money would be used to complete the purchase however it gets done.  

Any insights from anyone?  Thank you!!