Why not just get a supply and fit price from an installer. Installers get components at wholesale rates and add a margin to the part prices then add install margin making the job worthwhile. If you source all the parts and just pay to install, the install only cost will be higher as the job still has to be worthwhile for the instsaller. I charge £250 for a motorised install which includes brackets, pole, tm2600 motor, inverto black ultra, either 1m orbital or 1.1m triax dish and webro wf100 cabling. I do not charge for callouts in first year. if a part fails in warranty period there is no charge not even a callouts. There are decent honest Installers out there, not many but we do exist!
Can't believe how long this post has run. lol.