Even if it looks like I'm making great profit each month on rentals (anywhere from $200-400 after putting away 15% into savings and 8% on management) and yet the ROI is below 8% and our realtor said it needs to always be at least 8%.

I wasn't meaning to imply a majority of sellers. 

Ok so lets be realistic, obviously new investors or amateurs aren't going to be able to get professional investors to give a majority profit on new ventures , but what is the best way to start a partnership percentage speaking?

I've seen way to many multi family properties just get into that death spiral of a slum lord and horrible tenants and it's just one band aid after another until finally the owner extracts whatever they can and exits.I personally would want to be buying something at a little lower price, perhaps redeveloping, etc.Build value rather than extract value.If the assumptions above mentioned check out and you're happy with those returns I don't see a major hurdle ----  big however though is that you're only outperforming your cost of capital by maybe a percentage point?

There is profit margin to be made if the project is completed but for various reasons, I need to liquidate my capital and can no longer complete the project.

Would it be a good idea to find a mentor to walk me through every step of tHE efirst flip and then to take a percentage of the profit?

While the risks are not as great if you are just hiring one or two people, failing to properly distinguish between an employee and subcontractor can raise major headaches down the line. 

If I buy a house for $500,000 with $100,000 down and sell after 3 years with 7% increase each year how much would my profit be and why?

Excellent profit, happy neighbors, and happy new homeowner Lessons learned?

Using VA funding = fixer uppers may not be approved by the VA Firefighter working 72+ hour shifts = not a lot of down time to finish major construction jobsLooking for $350k < Want to purchase ImmediatelyMust be some kind of house hacking situation VA loan for primary residenceMulti Family =< 4 Units I see all these success stories here on BP and it blows my mind!