Hi Mika,
I had the opportunity to sit in a three wheeler yesterday at Goodwood and hopefully have good news.
I am not as tall as you , but height will not be the issue although the seat is fixed the pedals are movable. Not sure if this is one of fix for the driver or whether they will be adjustable.
I am also a bit bigger, lets say 100kgs + and had no trouble getting in and out. Actually found it easier that getting in and out of my +4. Especially as the roll bars provide excellent grip and leverage.
The removable steering wheel is also a help and would make a welcome option to the trads!!!!!
A couple of things to note....
1 the footwell is very narrow, precise footwork and narrow shoes will be the order of the day.
2 getting out it was tempting to put a foot on the seat (which i wouldn't want to do in my own car) to ensure I could step well clear of the exhaust.
All that said, just sitting in it brought smile to my face as it did to everyone else I saw.