A full Garmin suite like mine will cost probably 20K today. G3X 10" and a 7", GTN radio, GTX Xpdr with In and Out ADSB, two axis autopilot with control head. I wouldn't get the 7" screen if done again. Don't forget the ELT. Auto Pilot is truly unnecessary. I flew without using it for about a year and now that I am employing it from time to time I conclude that it is just a luxury item that I truly could have done without. If you aim to do a fair amount of cross country maybe you will find it worthwhile.