I did it myself hard to say how long it took because while I had it apart I did plugs impellers.fuel filters and thermostats.But if you have everything I would probably say a day.It is bolt on but there are some changes that have to be made.I had to redrill a few holes in the ECM bracket and you can not use the corsa mid pipes.I just went 4'hose from the risers to the transom tips.There are a few other little things that I will go over with you if you decided to do it.
A lot depends on your mechanical ability its not hard but I have played with engines all my life.
Also keep in mind your boat is newer this technically void your warranty.I had a riser start leaking at the end of last season so thats the main reason I did this I never expected it to make the boat come out of the water faster like this.

Thanks, makes sense.