Oh wait a minute, scratch that (my deleted comment). You already paid and have access, but they're saying 45k to set it up? That's insane!
It's not that hard at all:
• Budgets are so simplistic you shouldn't need any help at all
• Expense Allocations can be tricky, but once you get the hang of them and get a couple going, they're not bad. If you have really complex allocations, you might need some help or the functionality might not work for you
• Amort schedules - pretty easy in general once you get the hang of it
• Billing Schedules - they can get complex, but if you were pitched Advanced Financials instead of SuiteBilling, I'm assuming your billing isn't that complex
• Stat accounts - pretty easy in general once you get the hang of it
You can probably get 10-15 hours from a decent independent consultant for 10% or less of NS's estimate and be totally fine. You might not even need that many.