How a collection begins
The mistake most new collectors make is to buy widely and quickly. A collection is not measured by how many bottles it holds, but by how few of them are there by accident.
A collection begins not with a purchase but with a decision about what it is for. Bottles to drink over the next decade are a different cellar from bottles to keep for twenty years, and both are different from bottles bought only because they were available. Direction comes before acquisition. Without it, you do not have a collection; you have an accumulation.
The first discipline is restraint. It is tempting to buy widely, to have a little of everything. But a cellar built that way is shallow — full of single bottles you cannot compare, vintages you cannot follow, names that are there because they were offered rather than chosen. Better to go deeper on fewer things, and to understand why each is there.
The second discipline is provenance. A young collection is the easiest time to insist on it, because you are setting the standard for everything that follows. Buy bottles whose history you can follow, held in conditions you trust. It is far cheaper to buy well once than to spend years wondering about a bottle you cannot quite vouch for.
Format is part of the decision, not an afterthought. A magnum is not a larger bottle; it ages more slowly, and is a different relationship with time. Knowing when to choose one is part of building rather than buying.
None of this requires a large budget so much as a clear one. A considered cellar of thirty bottles tells you more about a collector than a careless one of three hundred. The point was never to acquire quickly. It was to keep well, and to keep only what is worth keeping.