I got my RE license as a means of targeted learning about RE, but being that it was a side endeavor and my main job salary and satisfaction kept improving I never made a full jump into RE agent-hood and hanging my license with a broker.My question as a potential primary residence buyer in new big-builder home purchase, could I hang my license with either a 100% commission brokerage or a broker friend for the transaction to retain the buyer's commission?

Signed all the papers, etc... they ask, "who's on the Title?"

If not the next easiest option would be to get a parent or someone else to co sign the loan.If neither of those options are possible I’d recommend putting this on hold until you graduate

I’m glad I did not sell last year, as the prices still went up and there is no signs of slowing down.

If you were an agent, I would say "Let her know it's true value, then have her sign a listing agreement and put a sign in the yard for what she wants.

Does anyone have any tips on seller financing, or any other ideas come to mind in making this a transaction that makes everyone happy.

Seller must provide an up-to-date lease agreement of every tenant (no month to month or handshake agreement)Seller must provide last 12 months of rent rolls (showing that every tenant is paying on time/no deadbeat tenant)If there is a security deposit, it needs to be signed over to the buyer at closing (so that the renter isn't required to pay another security deposit to start a lease with you)Is there a Property Management in place?

I have stressed to them the importance of ensuring we have a great JV contract signed by each of us before we move forward.

Both parties should review and sign and this creates the baseline conditions. 

Do not be in a rush to sign a tenant.