If I found a project that requires $100k to get done and it would make 1million in a year, what percentage would you share with the investor?

Only a tiny percentage will refuse and show up in court. 

Hi Jamal, It may be just be me but I would double the vacancy and repairs & Maintenance percentage just to be safe, it will help you in the long run to do that now.

In this eventuality, explain to them that the (cockamamie) arrangement you've set up with the new tenants is the only way to circumvent some obscure death benefit issue/provision in your specific life insurance policy language for payouts.

We were talking about a small finders fee, a small percentage and then a management fee, so perhaps you thought I was taking 50/50 which is not the case here. 

Is there a percentage rule of thumb that I should be applying to my property analysis to get a rough figure of yearly capex and maintenance expenditures?

Make sure you are putting away a percentage for maintenance expenses, vacancy, capex, and maybe future management expense.

How do I figure my worth as a percentage in this partnership and make sure I get a fair deal during the next 10 years and when we eventually sell?

Do they cap out at a certain price or is the loan cost all relative to the amount finances (i.e. a percentage)? 

Credit score mid 700, above 740.Current DTI is around 43%, credit cards utilized paid off in full monthly and I carry a LOC which I was planning to pay out but have access to when this deal popped onto my radar.