There are quite a few factors that can affect this, but in general, it's harder to sell high ticket items without sales contact.
I'd say it depends on what the expectations from your client are. Do they want to sell more, quickly? Do they want to have larger sales? If it's the former, do they have enough people to handle customer support and expansions? If the latter, do they understand the sales cycle would likely be longer and do they have people to work the customer through their buying journey?