It's all about relationships and creating win-win situations, so speak to your agents like you're trying to help him/her help you, if that makes sense.. but when you do find an agent that understand your mindset and your needs, I recommend giving him/her this guide!

And how could we be sure if this deal is a win win or not?

Do not get carry away; just trying to win.

That's puzzle piece number 1.Puzzle piece number 2 in the 1031 exchange is your reinvestment requirements - in this case you sold for 500K so you must buy for 500K.Puzzle piece #3 is that you netted after mortgage pay off 100K in cash - So you must use all 100K in the next purchase or purchases.So now just run the scenarios - your potential tax bill in CA on 100K of profit could easily be  30,000 or more.If you do a 1031 and buy for 500K and use all 100K in cash then you would pay no tax.If you do a 1031 and buy for 400K then the IRS perceives that as taking 100K in profit called boot (yes you might say that it is a return of capital or whatever but they have nuclear weapons and you don't so their interpretation wins).  

A true win-win.As a real estate broker, my favorite thing to do and my market niche is working with real estate investors.

This gives you the maximum amount of protection and allows for both partners to easily exit this deal.

All the concrete companies are booked up so it could easily be late July for this to happen. 

What are win-win options to look at discussing with motivated seller?

Great win to share with the community here!

You could easily spend 40-50k on what you just listed.