I am writing my business plan and I am trying to figure out how I will include in the renovation costs from a percentage of the purchase priceThis is really not possible, except in a very broad range.

I have several questions to answer before writing a proposal and would greatly appreciate any advice whether broad or specific:-What are the advantages of a partnership with a pre-determined percentage of profits shared VS a personal loan with a fixed interest rate?

Flipping/wholesaling etc at one end of the spectrum need time but less money.

The answer seems very broad vs specific to your circumstances. 

Every reason why a broad sector index fund is recommended is the exact opposite of why one invests in a single property. 

It can get overwhelming if you make the keywords too broad. 

Broadly speaking, no house will survive from a direct hit from a tornado.  

Broad Ripple, Fountain Square, Bates Hendricks has gentrified a lot and property values increased but the public schools in B.R aren't good so I'd put them in B category.

Broadly speaking, what investment strategy is working for you right now?

This is a very broad question and without tons of additional info no one credible will be able to provide you a logical response.