Teamleader Focus is a CRM, quoting and invoicing package that plenty of caterers run their sales and admin on. You don't have to give that up. Catermonkey keeps itself in step with your Teamleader account, so you are working from the same figures on both sides.
That saves you doing everything twice. Your customers, your product catalogue with its prices and VAT rates and your invoices sit in Catermonkey the way you have them in Teamleader. Won deals are waiting as confirmed orders, the rest as quotes. Invoices keep their own invoice number, so what your customer received still adds up. Nobody retypes anything and nothing goes missing between the two.
That is where it starts to pay off. As soon as a sale is in Catermonkey you carry straight on into the kitchen: preparation lists, allergens, portions and staff planning. You sell where you always have, and you run the event where that is easiest.