However, that profit in my opinion is very steep.

We'd like to split net profits 50/50 and I'd prefer if he can also get the tax benefits. 

They are funding these flips 100% and I am doing all the leg work and we are splitting the profits 50/50. 

Last year, I would say I had about a 10% vacancy rate and still netted about $200 monthly profit by house-hacking.

She is wanting to use a little bit of profit from this house for a downpayment on a new place where she movedTrying to not let the deal slip through, I offered to run some numbers on if I assumed her mortgage. 

Is there a way to structure deals with short-term seller financing or joint ventures that can be more attractive to sellers and just as profitable for investors?

Smoke and mirrors.I loved the way you started off by saying, "let's assume that...".This "analysis", profitability is based on future events you have no control over.First, the $945 at year 15 isn't all profit. 

150k in profit in under 2 years Lessons learned?

Monthly profit of about $993.17.

Investment Info:

Small multi-family (2-4 units) fix & flip investment in North Richland Hills.

Purchase price: $225,000

Cash invested: $71,000

Sale price: $315,000

Quick rental flip in North ...