class IV restriction on AN-2?

Hi

I'm totally baby pilot. but genius in engineering and I'm bear .

I read some kind of class IV restriction on AN-2.

in that case I can't fly my AN-2 to over 300 nm. and I can't land it to other place.

My aim is having my own air motor home. this restriction is so weird and unhappy.

If I made some modifications on that airplane. is it still impossible to bring it as motor home?

Luckily I mostly land on water. in that case still I'm under that restriction?

Here is my aim of new modification of AN-2.



Adding engine to on top.

and front.




so It will have at least two engine. ( i will add two engine on top, so it will have 3 engine)

If I add this what happen? Can I get other license? or should I register this plane to other country?

Thank you.