The best way in reality - if you are willing to put in the time to educate yourself both on Excel and finance - is to build the model yourself.

Despite the efforts of our best data scientists, using the latest tools in predictive analytics (using predictive modeling, data mining, machine learning), we never got it to the point where I felt we should offer it as a product.Outside of that, the only thing that really works is to research every property that meets your requirements and show up for every sale.

Offices pretty much except for a few business models you can use space anywhere.   

They may very well welcome your expertise and partnering offer.

When you analyse your deals, model how the property will work if your cost of capital were 8% ... if it can carry itself, then it is a deal where you can enjoy the current low rate and not loose sleep when they start to climb.

They will provide you with training on the practices and techniques within their business model.

There are several fresh comps that are model matches in my subdivision that further justified my decision to go forward.

The reason people wholesale is either they don't have the capital to do it themselves, its faster money, less stress, and the business model that works best for that specific company.

I've successfully done it.And there are MANY here on BP who use what model?  

@Brian EastmanI like your post, I understand the points that you are making and I know you are very knowledgeable, as this is your area of expertise.