Your church uses paid musicans? If you approach the subject of pay, I would check into this and get exact figures. Paid musicians, even for the largest of churches is a rarity and even then only for special events. Usually, I say its all or nothing. If you pay the "tech team", then musicians, ushers, nursery, etc. will expect to be paid also. Us church techies likely put in the most hours of any volunteer team by far -- I won't dispute that. But, there is something to be said about having a team of commited volunteers who can manage themselves and keep the ship sailing.
Depending on the size of your church, a part-time or full-time "media director" or "tech director" may be needed. That person can be in charge of organizing and delegating to volunteer teams and take care of all the equipment, etc. beyond what is required of a typical Sunday.
As an aside, special events are just that. They are "special", so weddings, funerals, etc. should all come with some type of fee structure for building use, setup and payment of said technicians. Our church does $15/hour, which is nice for those all-day concerts and the like.