You'll want to select a consultant with care, making sure that the one you pick has had a successful career and experience relevant to your needs. A good consultant will tell you the pros and cons of your approach and recommend alternatives, rather than making problems more complicated. Do your best to define the project and find a consultant particularly skilled at it. Avoid surprises by asking for a cost estimate before the work begins. Bankers Your banker can provide money, service, and an introduction to other professionals, but don't expect a loan if your business can't justify the risk.
Bankers are conservative because banking is a low-margin, highly regulated business.
Even so, business decisions are always somewhat subjective. Keep your banker informed of good news and bad news so a trusting relationship can develop over time. You may deal with several banks, each of which specializes in a particular service. For example, the bank that lends money to your business may not be efficient at international transactions. For borrowing, you pick a banker more than a bank.