do the work yourself...the two mounts are easy to change and one can be tricky...
so the front mount and the one above the gearbox are easy and you can do it yourself...the other mount may be hard if it is rusted on bent bolt etc....
if you have a jack you can do it yourself...of course there is the risk you will damage someting...but hey you will learn about your car...
as long as you support the engine properly you will be ok....
