When we met, this customer had 5 Copper CRM instances and they wanted to build out integrations. We had to explain that we'd have to charge them 5 times the price, for managing each of these Copper instances.
The reason is that for all intensive purposes when we're building integrations, we have to treat each CRM environment as a separate customer of ours. Each environment will have different API Keys, different custom field drop-down ID's for each environment, different custom fields for each environment, therefore creating 5 times the workload.
Do not make the same mistake! Your company will be a mess, and you'll be charged more through everything you do.