Try calling around, The chance of you finding someone who will connect something they didn't do and can't see is extremely small. Anyone who will, probably shouldn't be an electrician.
Getting someone to connect another electricians work can be hard if the work is hidden in walls etc.
Another knee jerk reaction. It works better leaving the plugs hanging from the walls, then screw them in when the electrician is satisfied. This way its easy for electrician to connect voltmeter to wires, validate connections. check for wiring faults etc. There is no need for an electrician to see through walls. Its the same as calling an electrician to replace a faulty plug socket, he is not going to replace all wiring to that plug socket just because exiting wiring is hidden in walls.
I have experienced my fare share of similar arguments in the past, people arguing against doing your own work. I have however found a trend, most of these knee jerk type comments seem to come from electricians themselves. As long as you working inside the law there is no problem with it.