Most marketing budgets are not too small. They are spread too thin to leave a mark anywhere.

Here is the most common budget problem we see: a business doing a little bit of everything. Some social, some search, a sponsorship, an occasional email, a radio spot in December. Each line item is defensible. The total is invisible.
People need to encounter a message repeatedly before it sticks, and advertising that stops short of that threshold is not partial credit, it is close to zero. Five channels at whisper volume lose to two channels at full presence, almost every time. The math is unforgiving and most media plans ignore it.
Pick the one or two channels where your customers demonstrably are, fund them to the level where repetition happens, and say no to everything else until those are saturated. Saying no is the hard part. Every sales rep, sponsorship committee, and platform will offer you a reason to dilute.
Concentration applies to the message too. One clear idea, repeated until you are tired of it, which is roughly when the market is starting to notice it. The campaigns people remember for years were not clever fifty ways. They were right once, relentlessly.
Look at last year’s marketing spend and ask: where did we show up often enough that a customer would call us familiar? If the honest answer is nowhere, the budget does not need to grow. It needs to gather.