You'll need to have a net worth equal to the loan amount and 10% of the loan amount as liquidity.

Would we have to be equal partners or could I be majority owner as I would be handling the majority of the business operations?

If it all things were equal, I'd purchase a purpose-built multi-family vs. a converted home. 

What were some vital saving habits you used or still use in order to be able to invest ?

Can the investor credit the tenant/buyer an amount equal to the option fee at closing as long as it's in the purchase agreement? 

ROI on paying a mortgage down, after you spend 5 hours in spreadsheets to "prove" this to yourself, will be exactly equal to the interest rate (assuming no PMI).How does your interest rate compare to the returns you could get putting the money to work for you elsewhere?

If they are VERY professional, they will have their processes in writing as verification that it is enforced equally and fairly by their entire staff. 6.

An amount sent via email in a spreadsheet, 2 days after the date we agreed I would receive payment, was equal to 12% of the net profits...Vastly different from the 60% split I was anticipating after rehabbing, managing and selling the property...This calculation included doubled the closing costs, recouping revenue and expenses that were already subtracted from the HUD/CD.

If they are VERY professional, they will have their processes in writing as verification that it is enforced equally and fairly by their entire staff. 6.

I lived in an apartment building in San Diego and they took the trash, water and sewer bill and split it equally between all tenants.