that horse combined with that armour will cost you tons of gold, never did a count up because I could not be arsed.lol, implying that cav has a learning curve.
Its allot, take a low upkeep horse and learn how to play as a cav.
there is no point in wasting you're loompoint if you do not know how to play as a cav.
Seriously, take a rouncey and get the basics.
There are so many good cav out there these days that you will be eaten alive.
What build are you going for?
If you need some help lets meet and ill try to give you some basic tips.