As a newbie, I'm thinking about my overall strategy...
Based on my first round in the hobby, I came out with two simple business model.
The first one I'll call the portfolio-diversification model. In short, to minimize the risk, I invest in seeing a large number of providers, such that I can at the same time taste the market out there in terms of service, rate, talent, skill, professionalism, attitude and so forth, wherease on the other side I have enough insurance to get the providers that I would like to be with in the future. This model, is of course the financial translation of the old dictum "diversification is the spice of life.'
The other model, is the one that I call the 'constant rate of return.' That is, I meet the same provider over a long span of time, a provider with who I enjoy share my time, because of her high profile in the hobby, great service (top-notch on 8,9 and 10-like review), and other intangible that I regard as very important (i.e. be on time, accomodating on schedule, intimacy, discretion, and so forth). In this model, my investment is cumulative over time, that is the value of being with that provider, increases over time. This latter state of affair is the translation of "put you money in the right bank."
This is just a hit, and more complex business model are under way. For now I appreciate, comments, advice, thoughts, and especially criticism are very welcome.