Hi all...first time forum user so please forgive the obvious newbie feel to my post. I have had many boats so I’m not new to cruisers. I am looking at Mariners anywhere from 2000 to 2007 and realize the differences after 2003. Found a 2003 which is bare bones but could have extras added to satisfy me. It’s the perfect model to fit in the river in front of my Ontario home (3 foot draft, lower bridge height, easy access everywhere etc). My questions for anyone that could comment are:
It has mercury 6.2 engines as opposed to crusaders...most online reviews prefer crusaders by a long shot. Anyone out there with the Mercs that could speak to them?
Has anyone ever added auto pilot at a later stage? I hear it’s almost impossible but would love to know if that is incorrect!
If I add a Raymarine sat dome in the USA and take a Canadian Direct TV box down there will it work there as well as in Canada when I eventually bring it to Ontario?
Any and all comments that would assist in my choice would be welcome...btw...I like the appearance of the Mariner so I am immune to negativity about the lines

Thanks a lot for any answers
“No Way Jose”