You cannot talk about development, just talk about implementation.
SharePoint consultants are mainly clicking and clicking tabs and configuring the black box in different ways.
Just one click in one place is going to completely change the behaviour of some aspect that you are going to hate it.
You will face things like: if we configure this parameter as “yes” 95% of the security is going to work. If you configure it as “no” this new requirement from the customer will be achieved but 50% of the security model will fail.
Isn’t there a solution? no with SharePoint development tool: you have to customize it with Visual Studio or say the client we cannot do that for them.
So then you are in trouble… again.
Good SharePoint consultants looks finds work around for all these things, but they also have consequences on other areas.
In any case you have to achieve a degree of commitment.