An idea for carrer mode

It may be too late to give ideas of carrer Mode but I recently came up with an idea in which:
You can recover parts They have already been used, that has nothing amazing but it occurred to me that your instead of recovering it and forgetting you have 2 options: 1. Sell it and forget about it and receiving as 70% (or more i dont know) of the money and 2. Reuse the part without losing or making money which will be like a subassembly that you can only use once, the tanks and struts will not be able to be edited in size but you can take out parts.
I hope that Andrew and the other creators of the game will make this idea real, I think that the game would become much more realistic, an example could be a space shuttle that you can reuse the orbiter and the srb.
PD: Having a fuel tank that at the end of the flight is example: 10% the other 90% will have to be paid.
I'm sorry I misspelled a word because I don't know english so good.