Let's jump straight into the thick of things. You're standing at a precipice - the precipice of marital bliss, one might say. The bachelor party, a rite of passage, is on the horizon and you're tasked with the arduous job of planning it, all while ensuring the economy of the event isn't compromised. But how does one establish a budget for this epic event?

As the eminent economist John Maynard Keynes postulated, "Budget is a method of worrying about money before it's spent." The importance of a stringent budget cannot be overstated. In fact, it behooves us to take a leaf out of Keynes' book and apply it to the planning of our bachelor party.

The first order of business is creating that blueprint, the skeletal structure of the plan. This encompasses the vision for this monumental event. It involves answering pertinent questions like: How many participants will there be? What kind of activities will the party include? Where will the party be held? These are the variables that will inevitably impact the budget.

The number of attendees directly impacts the budget. The implications of this situation reflect the economic principle of economies of scale, which states that as the production of a good or service increases, the cost per unit decreases. In our case, with more participants, the cost per person decreases, making the event more economical.

Following this, the choice of activities is an integral part of the plan. Whether it’s a weekend getaway, golfing excursion, or a night out on the town, the choice directly affects the budget. Here, the adage "time is money" rings particularly true. Each activity has a fixed cost and a variable cost associated with it, concepts borrowed from cost accounting. Fixed costs remain constant regardless of the duration of the activity (e.g., rental fee for a venue), while variable costs change based on the hours spent (e.g., food and drink).

The venue further compounds the budget. Whether it's an exotic island, a local pub, or a friend's backyard, the venue not only affects the cost but also sets the atmosphere for the event. In the real estate sector, the principle of "location, location, location" is of paramount importance. In our case, the choice of venue is integral to the event's success but must be measured against its impact on the budget.

Once the structural blueprint is in place, it's time to delve into the intricate details. Here, we need to focus on the microeconomics of the event – the allocation of limited resources. This principle also takes into account the concept of opportunity cost or the loss of other alternatives when one alternative is chosen. For instance, allocating a larger portion of our budget to an extravagant venue might mean compromising on the quality or variety of activities planned.

At this juncture, it's worth mentioning that the budget is not a fixed entity but a fluid one. It might be necessary to revisit and revise the budget based on feedback from attendees and changing circumstances. This flexible approach to budgeting is reminiscent of the adaptive markets hypothesis proposed by MIT economist Andrew Lo, which states that the market is not always efficient, but it adapts to changes.

In conclusion, budgeting for your ultimate bachelor party entails a careful balance of macroeconomic principles, microeconomic elements, and a healthy dose of adaptability. It's a delicate dance between fun and finance, where strategic planning and smart decisions can lead to a memorable event that doesn't break the bank. After all, as the erudite Benjamin Franklin said, "Beware of little expenses; a small leak can sink a great ship.” And we certainly don’t want the ship of your bachelor party to sink before it has sailed.